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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds that the result is scoped to a single snapshot and consists of opening lines/angles, but says nothing about volume, pagination, or availability per snapshot.

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?

A single clause-pair sentence with the action, the resource, and the dependency all front-loaded; nothing is padded or repeated.

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, annotation-covered read tool with no output schema, the description conveys enough to invoke correctly (what it returns, which snapshot, where the id comes from). Only minor gaps remain around result shape and how many hooks to expect.

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% for the single snapshot_id parameter, and the schema itself already says 'from get_trends'. The description's note about the id source duplicates rather than extends the schema, 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 ('Get the content hooks') and immediately defines what a hook is ('opening lines and angles'), scoped to 'one trend snapshot'. The resource is distinct from siblings like get_trends and get_trend_platform_content, though it doesn't explicitly name what it is not.

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?

Provides a sequencing prerequisite by noting 'snapshot ids come from get_trends', which tells the agent this tool runs after get_trends. However, there is no guidance on when to prefer this over get_trend_performance or get_trend_platform_content for the same snapshot, and no stated exclusions.

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