search_mcp_servers

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

With no annotations, the description carries the full burden of behavioral disclosure. It does convey the action and return fields, indicating a read-only search operation. However, it does not mention which fields the query matches against, ordering, authentication needs, or behavior when no results are found, leaving notable ambiguity.

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

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

The description is a single sentence that front-loads the action and then compactly lists the return fields. There is no redundant wording; it is appropriately sized and to the point.

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

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

For a four-parameter search tool with full schema documentation, the description is largely sufficient: it states the action and the returned shape. It lacks explicit sibling differentiation and detail on search semantics, but these gaps are minor given the schema's completeness.

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

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

Schema description coverage is 100%, and all four parameters have clear descriptions in the schema. The tool description adds no parameter-specific semantics beyond what the schema already provides, so the baseline 3 applies.

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

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

The description states a specific verb and resource ("Search the MCPVault directory for MCP servers") and lists the returned fields (name, grade, status, star count, description, listing URL), clearly identifying it as a list/search operation. However, it does not explicitly differentiate from sibling tools like get_mcp_server or submit_mcp_server, so it stops short of a 5.

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

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

No guidance is given about when to use this tool versus alternatives. The verb 'search' implies its purpose, but the description never states 'use get_mcp_server for a single server's details' or any other selection criteria. With three siblings present, this lack of routing leaves the agent to infer the right choice.

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