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

Annotations already declare readOnlyHint=true, destructiveHint=false and a closed-world scope, so safety is covered. The description adds the empty-query behavior and the return type (spot ids), but omits pagination/limit behavior for a tool that caps results at 200 with a default of 25.

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, zero filler, with the purpose and the search facets front-loaded ahead of the empty-query fallback and the downstream tool reference.

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 correctly discloses what comes back ('spot ids for surf_get_spot_status'). It is nearly complete, but the undocumented limit/pagination behavior is an unaddressed gap for an agent that may need to page through all spots.

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 coverage is 50% (query documented, limit not). The description enriches the query parameter with concrete area examples ('Oahu', 'California', 'Bali') and the empty-string behavior, which the schema does not state. However it says nothing about the undocumented limit parameter or result capping, so it only partially compensates.

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 and resource ('Find the surf spots this server covers') and enumerates the searchable facets (name, id, area, country). It also distinguishes itself from the sibling surf_get_spot_status by positioning that tool as the consumer of the returned ids.

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?

Gives clear context: use a query for name/id/area/country, or 'Leave query empty to list everything', which is an explicit when-to-use condition. It routes the agent to surf_get_spot_status for follow-up but states no exclusions or cases where another search tool is preferable.

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