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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds one genuinely useful behavioral note—that native request schemas live behind describe_operation—but discloses nothing about error behavior, not-found handling, or what the response contains.

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?

Extremely short, but a full sentence is wasted on verbatim duplication of the path, and the remaining sentence is a generic pointer. Nothing is front-loaded as a human-readable purpose statement.

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 lookup-by-ID endpoint with a nested 'params' object, an untyped free-form 'query' parameter, no output schema, and 0% schema description coverage, the description is not complete enough to call the tool confidently—the agent knows neither the ID format nor what the query object is for.

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 0%, so the description carries the full burden here, yet it says nothing about the required 'id' path parameter (format, expected values) or the free-form 'query' object. The ':id' fragment in the raw path is the only trace of parameter meaning, which is far below what a 0%-coverage schema requires.

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 restates the tool title verbatim (the raw path 'GET /api/users/:id' appears twice) rather than describing in plain language what it returns—presumably a single user record. It does not distinguish this tool from the sibling list endpoint get_users_65504d96f6ea97284441572c or get_users_by_userId_permissions, so an agent must infer the difference from the name alone.

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?

The only actionable guidance is a pointer to describe_operation for request schemas, which is a schema-lookup hint rather than a when/when-not rule. There is no statement about preferring this endpoint over the list endpoint when a single user ID is known.

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