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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint=false, so safety behaviour is covered. The description adds genuine value by enumerating the returned content (trails, uplift, facilities, times, terrain, tips), but it says nothing about ambiguity handling for partial matches or the failure mode when no park matches.

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?

Two tight sentences with zero filler; the lookup scope is front-loaded and the return contents are listed compactly afterward.

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?

For a one-parameter read with no output schema, the description helpfully previews the return shape, which compensates for the absent output schema. The only real gap is behaviour on ambiguous or failed name resolution.

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% and the schema already documents the single 'name' parameter with a partial-match example, so the description's 'exact or partial name match' largely restates it. Baseline 3 applies when the schema does the heavy lifting.

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 ('Fetch'), resource ('single UK bike park'), and matching mode ('exact or partial name'), plus enumerates the payload. The word 'single' implicitly separates it from list_bike_parks, but the sibling is never named, so differentiation is left to inference.

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?

No explicit when-to-use guidance, no mention of when list_bike_parks or search_bike_shops would be the better choice, and no note about what happens when a partial name matches several parks. The purpose implies a lookup scenario but nothing routes the agent.

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