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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds genuinely non-obvious behavior: monitoring and incident recording continue unaffected, and alerting self-restores at expiry or on unmute — exactly the side effects an agent needs to reason about before suppressing alerts.

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 tight sentences with the primary action first and the side-effect/restore semantics second. Every clause carries information; no filler.

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 mutation with a fully documented schema and no output schema, the description covers the key behavioral facts. It could add a one-line pointer to vs_monitors_unmute for early restoration and note whether muted state is queryable via vs_monitors_get, but nothing essential 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%, and the enum is already annotated with human-readable durations (60/480/1440/10080) in the schema itself. The description adds nothing about the id format or duration choice, so the baseline 3 applies.

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 states a specific verb and resource ('Mute a monitor's alerts') with an explicit time bound ('for a while'). It distinguishes itself from sibling vs_monitors_unmute by describing auto-restore, but doesn't explicitly name pause/unmute/stop_alerting as alternatives in a routing sentence.

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?

'Checks keep running and incidents are still recorded' implicitly tells the agent this is not the same as pausing a monitor, which is useful contrast. However, it never explicitly says when to pick this over vs_monitors_pause, vs_incidents_stop_alerting, or vs_maintenance_create, leaving the agent to infer the boundary.

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