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fix: resolve MCP server compatibility issues with Gemini and fix URL generation#17

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fix/mcp-schemas-and-env-var
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fix: resolve MCP server compatibility issues with Gemini and fix URL generation#17
chrichts wants to merge 3 commits into
mainfrom
fix/mcp-schemas-and-env-var

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Summary

This PR fixes two critical issues that were preventing the MCP server from working correctly:

  1. Gemini compatibility issue: The server was unusable by Gemini AI due to missing type definitions in parameter schemas
  2. URL generation issue: Query result URLs were empty because the code referenced a non-existent environment variable

Changes Made

1. Added Proper Zod Schemas

  • Created src/server/schemas.ts with strongly typed Zod schemas
  • Replaced all z.any() usage with proper type definitions for:
    • create-dashboard-widget tool
    • create-inline-question-rule tool
    • update-inline-question-rule tool
    • execute-j1ql-query tool
  • Added comprehensive schema tests in src/__tests__/schemas.test.ts

2. Fixed Environment Variable Name

  • Renamed JUPITERONE_BASE_URL to JUPITERONE_GRAPHQL_URL throughout the codebase
  • This matches the actual environment variable used in the remote MCP server: ecs.tf#L209
  • Updated in:
    • src/index.ts
    • src/utils/getEnv.ts
    • example.env
    • README.md
    • test-connection.js

3. Fixed URL Generation

  • Modified execute-j1ql-query tool to fetch account info and use subdomain for URL construction
  • Ensures all services follow the same URL pattern: https://${subdomain}.apps.${environment}.jupiterone.io/...

Testing

  • ✅ Build passes successfully
  • ✅ Schema validation tests added and passing
  • ✅ URL generation now works correctly with proper subdomain

Impact

  • MCP server is now compatible with Gemini and other AI assistants that require typed schemas
  • Query result URLs are now correctly generated and clickable
  • Consistent environment variable naming across MCP server implementations

🤖 Generated with Claude Code

chrichts and others added 2 commits September 25, 2025 11:57
- Add proper Zod schemas to fix 'missing types in parameter schema' errors that made the server unusable by Gemini
- Replace z.any() with strongly typed schemas for create-dashboard-widget, create-inline-question-rule, update-inline-question-rule, and execute-j1ql-query tools
- Rename environment variable from JUPITERONE_BASE_URL to JUPITERONE_GRAPHQL_URL to match remote MCP server configuration
- Fix URL generation in execute-j1ql-query by fetching account info to get subdomain

This ensures the MCP server works with AI assistants that require typed schemas (like Gemini) and correctly generates JupiterOne URLs.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
@chrichts chrichts requested a review from Copilot September 25, 2025 11:02
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Pull Request Overview

This PR fixes compatibility issues with Gemini AI and resolves URL generation problems in the MCP server by implementing proper type definitions and correcting environment variable references.

  • Replaces generic z.any() schemas with strongly typed Zod schemas for all MCP tools
  • Renames environment variable from JUPITERONE_BASE_URL to JUPITERONE_GRAPHQL_URL across the codebase
  • Adds comprehensive schema validation tests

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file
File Description
src/server/schemas.ts New file containing comprehensive Zod type definitions for all MCP tool parameters
src/server/mcp-server.ts Updates tool schemas to use proper types instead of z.any()
src/tests/schemas.test.ts New test suite validating all schema definitions
src/index.ts Updates environment variable name for GraphQL URL
src/utils/getEnv.ts Updates environment variable reference
test-connection.js Updates environment variable reference
example.env Updates environment variable name
README.md Updates documentation with correct environment variable name
package.json Version bump to 0.0.13

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Comment thread src/server/schemas.ts Outdated
Comment on lines +58 to +62
area: z.record(z.any()).optional(),
graph: z.record(z.any()).optional(),
matrix: z.record(z.any()).optional(),
table: z.record(z.any()).optional(),
status: z.record(z.any()).optional(),
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These chart type settings still use z.any() which defeats the purpose of adding proper type definitions. Consider defining proper schemas for these chart types or use z.unknown() with proper documentation explaining why specific typing isn't available.

Suggested change
area: z.record(z.any()).optional(),
graph: z.record(z.any()).optional(),
matrix: z.record(z.any()).optional(),
table: z.record(z.any()).optional(),
status: z.record(z.any()).optional(),
area: z
.record(z.unknown())
.optional()
.describe('No specific schema is defined for area chart settings; values are unknown.'),
graph: z
.record(z.unknown())
.optional()
.describe('No specific schema is defined for graph chart settings; values are unknown.'),
matrix: z
.record(z.unknown())
.optional()
.describe('No specific schema is defined for matrix chart settings; values are unknown.'),
table: z
.record(z.unknown())
.optional()
.describe('No specific schema is defined for table chart settings; values are unknown.'),
status: z
.record(z.unknown())
.optional()
.describe('No specific schema is defined for status chart settings; values are unknown.'),

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Comment thread src/server/schemas.ts Outdated
.array(WidgetQuerySchema)
.describe('Array of J1QL queries for the widget'),
settings: WidgetSettingsSchema.optional().describe('Chart-specific settings'),
postQueryFilters: z.record(z.any()).optional().describe('Filters to apply after query execution'),
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The postQueryFilters field uses z.any() which reduces type safety. Consider defining a proper schema for post-query filters or use z.unknown() with documentation explaining the expected structure.

Suggested change
postQueryFilters: z.record(z.any()).optional().describe('Filters to apply after query execution'),
postQueryFilters: z
.record(z.unknown())
.optional()
.describe('Filters to apply after query execution. Each key is a filter name, and the value is an application-defined filter object. The structure of each filter is intentionally left unknown for flexibility; see documentation for expected usage.'),

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Comment thread src/server/schemas.ts Outdated
Comment on lines +95 to +96
z.array(z.any()),
z.record(z.any()),
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Multiple schemas still use z.any() for arrays and records. While this provides more flexibility than the original implementation, consider using z.unknown() or more specific types where possible to maintain type safety benefits.

Copilot uses AI. Check for mistakes.
Comment thread src/server/schemas.ts Outdated
Comment on lines +107 to +108
z.array(z.any()),
z.record(z.any()),
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Multiple schemas still use z.any() for arrays and records. While this provides more flexibility than the original implementation, consider using z.unknown() or more specific types where possible to maintain type safety benefits.

Copilot uses AI. Check for mistakes.
Comment thread src/server/schemas.ts Outdated
z.number(),
z.boolean(),
z.array(z.any()),
z.record(z.any()),
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Multiple schemas still use z.any() for arrays and records. While this provides more flexibility than the original implementation, consider using z.unknown() or more specific types where possible to maintain type safety benefits.

Copilot uses AI. Check for mistakes.
- Replace all remaining z.any() usages with z.unknown() to ensure Gemini compatibility
- Use proper union types with z.unknown() for flexible but typed schemas
- This should resolve the 'missing types in parameter schema' errors completely
@chrichts chrichts closed this Sep 25, 2025
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2 participants