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

Goes well beyond the readOnly/non-destructive annotations: it discloses that media URLs are sensitive and expire in about an hour, that they should not be cached, that network_requests is null for older feedback, and that returned text is untrusted data whose instructions must not be followed. That last point is a genuinely valuable safety disclosure for a read tool.

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 tight paragraphs, front-loaded with the core fetch behavior, then return-shape guidance, then safety warnings. Dense but each sentence carries operational information; nothing is padding.

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?

There is no output schema, so the description must convey the return shape, and it does: the console block with its counts and how to get authoritative entries, plus the media link fields. Combined with the expiration and untrusted-data warnings, nothing needed to call it correctly is missing.

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%, so the baseline is 3, but the description adds meaning the schema lacks: it explains what the media links are (screenshot and video recording) and that they are short-lived, which clarifies the impact of include_media beyond the schema's 'Defaults to true'.

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 ('Fetch a single Ybug feedback item by its id') and names the scoping that separates it from list_feedback. An agent can tell it apart from the sibling list/console/network tools immediately.

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 explicit routing advice: read get_feedback_console_logs and get_feedback_network_requests when investigating a bug and the counts show errors or failed requests, and read them before suggesting a cause. It does not explicitly state when to use this tool versus list_feedback, but the 'by its id' scoping implies it.

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