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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds value beyond that by disclosing the concrete return payload (5-step checklist + official report URL) and the jurisdictional scope (UK). It doesn't mention whether the optional bike details personalize the output, but that is a minor gap given 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?

Two compact sentences with the purpose front-loaded, followed by the return contract and a representative user utterance. Slight redundancy with the title ('How to report a stolen bike') but no wasted prose.

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?

An output schema exists, so return values needn't be spelled out, yet the description still summarizes them, which helps routing. For a guidance/checklist tool with zero required parameters this is nearly complete; the only real hole is the unexplained optional brand/model/serial inputs.

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 0% for three parameters (brand, model, serial), so the description carries the full burden and says nothing about them. An agent cannot tell from the text whether supplying serial changes the checklist, whether these are optional context, or what format a serial takes. This is the definition's clearest weakness.

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 states a specific verb and resource ('reporting a stolen UK bike') and enumerates the areas covered: police, insurance, listing alerts. It also says exactly what comes back, a 5-step checklist plus the Cyclesite report URL. It never explicitly contrasts itself with siblings such as check_stolen, so it lands at a clear 4 rather than a 5.

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 example query "my bike was just stolen, what do I do?" gives an unambiguous trigger condition, and the UK scope narrows applicability. There is no explicit when-not guidance and no named alternative (e.g. 'use check_stolen to verify whether a serial is already flagged'), which keeps it short of a 5.

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