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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds genuine behavioral context beyond that: it discloses the three aggregate findings produced, notes they omit the resource field, and explicitly states 'Does not store the tools,' which is a useful non-persistence guarantee absent from 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?

Three short sentences, front-loaded with the scope, then the return shape, then the side-effect disclaimer. The fragment 'Those three omit resource' is terse to the point of being cryptic, which slightly undercuts an otherwise efficient structure.

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?

With no output schema, the description does take on return-value disclosure and delivers the main finding categories plus a note about the resource field. Both optional parameters are covered by the schema, and the no-storage guarantee is stated, leaving only minor gaps such as finding severity or ordering.

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%, so both parameters are fully documented in the schema, giving a baseline of 3. The description restates the tools/list-vs-server-card duality and the omitted-tools fallback but adds no format or syntax detail beyond what the schema already provides.

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?

States a specific verb ('Check') and a clear resource scope ('every tool in a tools/list result or a server card'), and the aggregate checks it produces are named. It implies but never states the distinction from the sibling check_tool (singular vs. whole-list), so differentiation is left to the reader.

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 explicit when-to-use or when-not guidance, and no alternative is named. The only conditional ('result is used only when tools is omitted') lives in the schema, not the description, so an agent gets no routing help against check_tool.

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