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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false; the description adds real context beyond them by labeling it WRITE, spelling out the state change (re-included in default list, notifications resume), and giving the PUT endpoint. It doesn't cover error behavior if the group isn't muted, but that is a minor gap against annotation coverage.

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 sentences, zero filler: the operation type and effect come first, the API endpoint second. Everything is front-loaded and nothing repeats the title verbatim without adding substance.

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 two-parameter state-change tool with annotations supplying the safety profile and no output schema, the description covers effect, scope, and endpoint adequately. It could be slightly richer about idempotency/error cases, but nothing essential for correct invocation 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 description coverage is 100%, so both project_id and group_id are already fully documented with types, patterns, and provenance. The endpoint template in the description echoes the same two parameters without adding format or constraint detail, so the baseline 3 is appropriate.

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 (unmute), the exact resource (one error group), and the concrete effect: it returns to the default error list and notifications resume. This distinguishes it clearly from airbrake_mute_group and from read-only group tools like get_group/list_groups.

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 description implies when this applies (a group that has been muted and should notify again), but never names the alternative airbrake_mute_group or states any exclusion/precondition. An agent can infer the use case, but routing guidance is left implicit.

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