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

With no annotations, the description carries the full burden. It does add genuinely useful behavioral detail about in-flight sends finishing while pending ones are canceled, which is the key semantic of this delete. However, it omits idempotency (does deleting a non-existent wake error?), permissions, and whether the wake configuration is removed or merely disabled.

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, front-loaded with the core effect, and the second sentence carries a real distinction rather than filler. Nothing is redundant or wasted.

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 zero-parameter, no-output-schema mutation, the description covers the primary effect and the subtle in-flight behavior. It is slightly incomplete on error/idempotency behavior and on whether the wake endpoint is removed or just deactivated, which could affect repeated calls.

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?

The tool takes zero parameters, so the baseline is 4. The description adds nothing about parameters, correctly, since there are none to explain.

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 opens with a specific verb-object phrase ('Stop waking') and immediately clarifies the mechanism ('AgentLater no longer calls the wake URL'), which distinguishes it functionally from set_wake. It stops short of naming the sibling explicitly, so the differentiation relies on the name pairing rather than stated contrast.

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 intent ('Stop waking') implies when to use it, but there is no explicit when/when-not guidance and no named alternative such as set_wake for re-enabling. An agent can infer the use case from context but gets no routing instructions.

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