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

The readOnlyHint annotation already communicates the read-only nature. The description adds the precondition of requiring project context, which is helpful. It does not mention pagination or other behavioral details, but nothing is hidden or contradictory, so a slight deduction is appropriate.

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 concise, front-loaded with the main purpose, and uses no unnecessary words. It is well-structured with two sentences covering the action and the usage caveat.

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?

Given that no output schema is provided and the tool is relatively simple, the description covers all necessary context: what it does, what data it includes, how to use it, and the prerequisite. No additional information is needed for an agent to decide when and how to call it.

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?

Both parameters (skip, take) are fully described in the schema with defaults and maximums, giving 100% schema coverage. The description does not add extra semantic meaning beyond the schema, so the baseline score of 3 is appropriate.

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 clearly states that the tool lists test suites in the active project and specifies that stats include test case count and auth mode. It also distinguishes this tool from get_test_suite, making the purpose unambiguous.

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 description explicitly tells when to use this tool ('browse suites or find a suite id') and when to use the alternative ('for one suite with its cases use get_test_suite'). It also notes the prerequisite of setting project context via set_context, giving clear usage guidance.

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