Skip to main content
Glama

404.directory

by io.github.MM-sheng

Inspect a callable MCP server

inspect_tool_server
Read-onlyIdempotent

Live-inspect one active, provider-verified, operator-curated public MCP server from the 404.directory catalog. Returns only the remote read-only tools approved for gateway execution, including their current descriptions, JSON input schemas, and annotations. Use after search_tools and before the first invoke_registered_tool call, or whenever arguments may have changed. This operation does not execute a remote business tool.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
id_or_slugYesCatalog server UUID or slug returned by search_tools, for example 'microsoft_learn_mcp'.

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Added

TDQS

A4.7/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already mark read-only, idempotent, and non-destructive. Description adds context about being provider-verified and operator-curated, and explicitly states it does not execute a remote business tool. No contradiction; description enriches without repeating annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four concise sentences: purpose, output, usage timing, and non-execution note. Front-loaded with the key action, no fluff or redundancy. Each sentence adds distinct value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers purpose, output content (remote read-only tools with descriptions, schemas, annotations), usage timing, and a constraint (does not execute). No output schema exists, but the description sufficiently explains what will be returned, making it complete for the agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The single parameter id_or_slug is fully described in the schema (100% coverage) with details about being a UUID or slug from search_tools. The description does not add further meaning beyond what's already in the schema, so baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clearly states the action (live-inspect a server) and specifies the target (active, provider-verified, operator-curated public MCP server from the 404.directory catalog). It distinguishes from siblings like search_tools and invoke_registered_tool by focusing on inspection and explicitly noting it does not execute a remote tool.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit when-to-use guidance: 'Use after search_tools and before the first invoke_registered_tool call, or whenever arguments may have changed.' Also clarifies it does not execute a remote business tool, which prevents misuse. No alternatives listed but sequencing is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All 404.directory toolsInspect
Try in Browser
RayrunBuild, deploy, and operate MCP servers without becoming an infrastructure team.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.

TDQS

A4.2/5.0
Disambiguation4/5

Tools are mostly distinct with clear descriptions. Potential overlap exists among search_tools, recommend_tools, list_capabilities, and get_capability_graph, but each serves a different purpose (query vs. recommendation vs. high-level list vs. relational graph). inspect_tool_server vs. get_tool (server vs. tool) and verify_web vs. understand_webpage (reachability vs. content) are clearly separated. Minor ambiguity between list_capabilities and get_capability_graph, but descriptions clarify.

Naming Consistency5/5

All tool names follow a consistent verb_noun pattern (e.g., compare_tools, get_tool, search_tools, verify_web). No mixing of camelCase or inconsistent styles. The naming is uniform and predictable.

Tool Count5/5

12 tools is within the ideal 3-15 range and appropriate for a directory service that provides search, retrieval, comparison, recommendation, inspection, invocation, and web verification. The count is comprehensive without being overwhelming, and each tool adds distinct value.

Completeness4/5

The tool set covers core directory operations (search, get, compare, recommend) and additional utilities (inspect, invoke, trust score, capability graph). It lacks a direct 'list all tools' or 'list all servers' endpoint, but search_tools and list_capabilities can approximate this. The inclusion of web verification and understanding tools extends beyond the catalog domain, but they are useful adjuncts. Overall, the surface is well-rounded with minor gaps.

Resources