list_stats_server

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint false, so the safety profile is covered. However, the description adds no extra behavioral context—it does not describe what data is returned, whether authentication is required, or any potential side effects. The description merely repeats the HTTP method and path, adding minimal value beyond the annotations.

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 very short and to the point, containing only the purpose statement and the endpoint. It is efficient with no filler, but the lack of structure (no headings, no separation of concerns) and the vague phrasing prevent a higher score. It earns points for brevity but loses some for not being more informative within that brevity.

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?

Even though there are no parameters and an output schema exists, the description does not clarify what 'stats server' means or what kind of statistics this endpoint returns. An agent calling this tool would have no idea whether it returns system metrics, user counts, or something else. This lack of context makes the tool incomplete for correct invocation and interpretation of results.

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?

This tool has zero parameters, so the description has no parameter semantics to explain. The schema is empty and coverage is 100%. There is nothing for the description to add, and it correctly does not attempt to describe nonexistent parameters. The baseline of 4 applies here since no information is missing.

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 'Get stats server' is essentially a restatement of the tool name with no elaboration on what 'stats server' refers to or what data it returns. It includes the HTTP endpoint, which adds some specificity, but it does not distinguish this from sibling tools like get_stats_year_by_year or list_me_listening_stats. An agent cannot tell what this tool does beyond a vague 'get server stats'.

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?

There is no guidance on when to use this tool versus alternatives. The description does not mention any conditions, prerequisites, or exclusions. It simply states the endpoint without providing context on the appropriate use case, leaving the agent to guess when to select this over other stats-related tools.

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