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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), so the description's value is in the provenance details it adds: freeCourts.source distinguishes calendar feed vs. scraped platform page, and the 'claimed' flag warns that unclaimed rows are our reading and may be out of date. That is meaningful reliability context beyond structured fields. It does not state result limits or ordering, which keeps it from a 5.

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?

Everything stated is relevant, but the first sentence is a long run-on with a nested parenthetical explaining freeCourts.source that is dense to parse. Front-loading the primary action (find/filter clubs) would improve scanability; the include guidance, arguably the most decision-relevant line, sits mid-paragraph.

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?

There is no output schema, so the description must carry the return-value burden, and it does by naming each row field and explaining the claimed flag's two states. With all three parameters documented and annotations covering safety, an agent has enough to call this correctly; only result volume/pagination is unaddressed.

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%, with city values, name slug derivation, and the include enum all documented in the schema, so baseline is 3. The description adds the decision use case for include:'listed' ('where can I play here?'), but repeats rather than extends the city/name semantics.

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 names the resource precisely (padel clubs) and enumerates the returned fields: booking link/platform, courts, today's free courts, founding status. An agent can distinguish it from find_coaches, find_matches and find_series without opening any schema. It lacks an explicit verb, but the noun-phrase-plus-field-list makes the retrieval action 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?

It gives concrete routing for the include parameter: pass 'listed' to also get unclaimed clubs, framed as the answer to 'where can I play here?'. It also states the two filtering modes (by city, or one club by name). No explicit exclusion of sibling tools is needed since the resources are disjoint, but there is no stated when-not-to-use.

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