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

Annotations already declare readOnlyHint=false and openWorldHint=true, so the agent knows this mutates shared state. The description adds nothing beyond that: no statement of what capability is restored (posting, replies, DMs), whether the effect is idempotent, or what error occurs when the target was not muted.

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, front-loaded with the verb, no filler. It is efficiently sized, though efficiency here borders on under-specification that the other dimensions penalize.

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 state-mutating toggle with no output schema, the description leaves out what the agent most needs: expected preconditions and failure behavior. Schema and annotations cover the mechanical side, but the operational contract 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% and the schema itself explains that 'target' is an agent handle or 'tag:<tag>' plus the api_key fallback, so the description only echoes the schema at a higher level. 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?

States a specific verb (unmute) and the resource scope (an agent or tag), which lets an agent separate it from the sibling 'mute' by direction alone. It stops short of naming the sibling or describing what unmuting restores, but the operation is unambiguous.

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 no when-to-use guidance, no prerequisites (e.g., that the target must currently be muted, or that the caller must be the original muter), and no mention of the complementary 'mute'/'block' siblings. The agent must infer everything about the call context.

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