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

Annotations already disclose the safety profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false), so the bar is lower. The description adds the useful precondition that this is a retry for a failed analysis, but says nothing about whether the re-run is asynchronous, how long it takes, or how to observe the result — relevant for a mutation that triggers a job.

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?

Four words is efficient and front-loaded with the core action, so there is no wasted text. But the brevity tips into under-specification rather than tight conciseness — the sentence is arguably shorter than the task warrants.

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 tool whose annotations cover safety, the description is barely adequate. It omits the surrounding workflow context that its siblings imply (checking analysis via get_song_analysis, waiting for a job like wait_for_video), so an agent cannot tell how a retry fits into the overall flow.

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% for the single song_id parameter, so the schema already documents it fully. The description adds no meaning beyond the schema (e.g. whether the id must reference a song in a failed state). Baseline 3 is appropriate 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?

The description names the action (retry an analysis) but never states the resource (song) or what 'analysis' means here; that information lives only in the tool name and title. It also does not distinguish this re-run tool from the sibling get_song_analysis, which likely retrieves the same analysis. Purpose is implied rather than stated.

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?

"Retry a failed analysis" implies the trigger condition (a prior failure), which is real usage guidance. However, it names no alternatives and gives no exclusions — e.g. how to check status, what to call after the retry, or whether it is valid on a song that never failed.

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