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

Annotations already establish the safety profile (readOnly=false, destructive=false, idempotent=false) plus the schema's dry_run field documents preview behavior. On top of that the description discloses a real behavioral gate — the call is refused after release submission. It stops short of saying whether unlisted fields are preserved or cleared, which is the key mutation risk here.

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 short sentences with zero filler, purpose first and the refusal condition second. Nothing to trim and nothing buried.

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 mutation tool with no output schema and a free-form nested 'fields' object, the definition covers the critical refusal precondition and the schema covers the dry_run workflow. It does not, however, clarify what happens to existing values not named in fields, which is the main thing an agent needs before an overwrite.

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 75% and the schema itself explains artist, the fields map, and dry_run richly; only album_id is undocumented. The description adds nothing about parameters, so per the coverage rule the baseline of 3 applies — the schema carries the weight rather than the prose.

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 ('Amend an album's details'), which cleanly separates it from create_album and update_track. However, it never contrasts itself with near-siblings like set_album_tracks or save_release_draft, so the agent must infer the boundary between amending metadata and other album mutation tools.

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 sentence 'Refused once its release has been submitted' gives a genuine precondition telling the agent when the call will fail, which is more than most definitions offer. But it never names an alternative for that blocked case (e.g., a draft or release-edit tool) or states prerequisites for locating an album_id, leaving the routing decision half-specified.

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