* In DynamicJsonForm.tsx
- In debouncedUpdateParent, formatJson, and validateJson,
- when trimming the JSON value, use ?.trim() in case the field is null
* In jsonUtils.ts
- in tryParseJson
- use ?.trim() in case the field is null
* In schemaUtils.ts
- in normalizeUnionType
- add condition to handle the case where there is an anyOf with array or null as options
* In ToolsTab.tsx
- for nullable fields, in null checkbox, in onCheckedChange handler
- when not checked, if prop type is array, set to undefined (empty input field that can be edited rather than the word "null" as the default could provide
Fixes#846
- Update generateDefaultValue to return undefined for optional object parameters
- Add comprehensive tests for required vs non-required objects
- Fixes issue where MCP Inspector sends empty objects {} for optional parameters
- Objects with required properties still return populated objects
- Empty optional objects now return undefined to be omitted from requests
Refs #771
- Extract tool results rendering into separate ToolResults component
- Hoist checkContentCompatibility function to module level following codebase conventions
- Add ajv@6.12.6 as direct dependency to client package.json
- All tests pass and linting is clean
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Applied consistent formatting to ToolsTab.tsx and schemaUtils.ts
to fix linting issues. No functional changes.
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Co-Authored-By: Claude <noreply@anthropic.com>
This commit adds comprehensive support for structured output validation in tool calls,
following the MCP specification for tools with output schemas.
UI Changes:
1. Output Schema Display:
- Added collapsible output schema section in ToolsTab
- Shows output schemas after input fields, before the Run Tool button
- Default view shows 8 lines with scrolling, expandable to full view
- Expand/Collapse button with chevron icons for better UX
2. Structured Content Display:
- New "Structured Content" section when tools return structuredContent
- Shows structured data in a formatted JSON view
- Validation status indicator (green checkmark for valid, red X for errors)
- Detailed validation error messages when content doesn't match schema
3. Unstructured Content Labeling:
- Added "Unstructured Content" heading when both structured and unstructured content exist
- Only shows label when structured content is also present
- Maintains clean UI when only unstructured content exists
4. Compatibility Checking:
- Checks if unstructured content matches structured content (when output schema exists)
- Shows compatibility status with blue (compatible) or yellow (incompatible) indicators
- Detailed messages explain why content doesn't match
- Only runs compatibility check for tools with output schemas
5. Validation Error Handling:
- Shows error when tool with output schema doesn't return structured content
- Clear error messages for schema validation failures
- Maintains proper error state display
Technical Implementation:
- Added schema validation utilities using Ajv (same as SDK)
- Caches compiled validators for performance
- Validates on tool result display, not during the call
- Follows SDK's Client.callTool validation pattern
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Co-Authored-By: Claude <noreply@anthropic.com>
