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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, so safety is covered. The description adds genuine behavioral context beyond them: private, removed and nonexistent clips are indistinguishable and all surface as not found, and group clips expand into per-rider stats and links.

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?

Front-loaded with the core purpose and closes with the error semantics in one tight sentence. The first sentence is long and enumerative, but every clause carries information rather than filler.

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 single-resource read tool with only one fully-documented parameter, an output schema, and annotations covering the safety profile, nothing needed to invoke or interpret the call is missing. The not-found semantics and group-clip expansion even go beyond the minimum.

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 100% and the single 'id' property already documents its type/format including the URL pattern. The description adds nothing about the id beyond 'by id', so the baseline 3 applies.

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 ('One public clip by id') plus the exact scope of the returned record (location, time, rider, measurements, calibration, group breakdown). An agent can distinguish it from search_clips, which returns many clips, without reading either schema.

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?

'by id' implies the precondition that an id is already known, and the not-found clause tells the agent what happens on a miss. However, it never explicitly routes the agent to search_clips when it needs to discover an id, so usage is only implied.

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