mcp-response-types-lab
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| MCP_TRANSPORT | No | Transport mode for the MCP server. Set to 'http' to run over Streamable HTTP (listens on http://localhost:3939/mcp). If unset, the server uses stdio. |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| no_schema__text_onlyA | No outputSchema. Returns a plain text content block only. This is the pre-2025-06-18 baseline. |
| no_schema__structured_onlyA | No outputSchema declared, but the result carries structuredContent and an EMPTY content array. Tests whether a client that never saw an outputSchema will still surface structuredContent, or shows nothing because content is empty. |
| no_schema__text_and_structuredA | No outputSchema declared, but the result carries BOTH a text content block and structuredContent (matching values). Tests whether structuredContent is used opportunistically even without a declared schema. |
| with_schema__text_and_structured_matchingA | outputSchema declared. Returns matching text + structuredContent (the spec's recommended backward-compatible pattern). |
| with_schema__structured_only_no_textA | outputSchema declared. Returns structuredContent with an EMPTY content array (no text fallback). Tests whether the client/model can operate on structuredContent alone. |
| with_schema__text_and_structured_mismatchedA | outputSchema declared. Text content and structuredContent DISAGREE on the actual values. Tests which one the client actually feeds to the model / shows the user. |
| with_schema__structured_violates_schemaA | outputSchema declared, but the returned structuredContent violates it (wrong types, missing required field). Tests whether the client validates structuredContent against outputSchema and how it fails. |
| with_schema__structured_missingA | outputSchema declared, but the result omits structuredContent entirely (only text content is returned) — a non-compliant server. Tests client behavior when a promised schema is never fulfilled. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 8 tools
Each tool targets a distinct response-type scenario (schema presence × content composition), with descriptions that clearly differentiate matching, mismatched, missing, and violating structured content. No two tools are functionally interchangeable.
All tool names follow a uniform pattern: [with_schema|no_schema]__[content description]. The consistent use of double underscores and ordered descriptors makes the naming scheme predictable and scannable.
8 tools is well-scoped for a response-types lab, covering the combinatorial space of schema declarations and text/structured content variations without redundancy or bloat.
The tool set covers the major response-type permutations: no schema (text-only, structured-only, both), with schema (matching, mismatched, structured-only, schema violation, missing structured content). This is a thorough and coherent test surface for the lab's purpose.