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

The description adds real context beyond the annotations: it discloses that scheduled/manual modes destroy the existing wake route and that no scheduler, listener or authority is implicitly created. That complements destructiveHint=true and clarifies the blast radius. It still doesn't say what the response looks like or what happens to a prior preference in listener mode, so the disclosure is partial rather than rich.

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 core action front-loaded and the destructive side effect immediately following. Nothing is padded, though the closing clause about 'no scheduler, listener or additional authority' is terse enough to require a second read.

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 three-parameter mutation with no output schema, the definition covers the key risk (old wake route cancelled) and the key non-effect (no authority granted). Missing pieces are the semantics of interval_minutes and the return shape, which is a modest gap given otherwise adequate coverage.

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 low at 33% and only room_id is documented in the schema. The description glosses the four mode values in prose, which helps, but interval_minutes is never mentioned — the reader cannot tell that it applies only to scheduled mode or what happens if it is supplied with listener or manual. Partially compensates, not fully.

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 ('Records') and resource ('this participant's ... delivery preference') and enumerates the four supported modes (listener, scheduled-check, manual, event), which maps directly to the mode enum. It stops short of naming sibling tools like set_check_schedule, so the agent must infer the boundary itself.

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?

Usage is only implied by the mode list; there is no explicit when-to-use guidance, no statement of when-not-to-use this versus set_check_schedule or claim_wake, and no prerequisites such as when a scheduled mode is legal. The 'scheduled/manual cancel the old wake route' note does at least flag a switching consequence.

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