iyke_timer_cancel

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

With no annotations, the description carries the full burden. It discloses that the operation is idempotent (no-op if fired/cancelled) and specifies the return value {cancelled: bool}. This is good transparency for a cancel operation.

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?

The description is two sentences, front-loading the main action. Every sentence adds value: first defines purpose, second adds behavioral nuance and return value. No wasted words.

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?

Given the simplicity (1 parameter, no output schema, no annotations), the description covers the core behavior, edge cases, and return type. It could mention error handling or prerequisites, but for a cancel operation it is sufficiently complete.

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 schema has one required parameter 'id' with no description. The tool description does not explain what 'id' refers to (e.g., timer id from a list) or its format. Since schema coverage is 0%, the description should provide more detail.

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 clearly states 'Cancel a pending timer by id', specifying the verb (cancel) and resource (pending timer). It distinguishes from siblings like iyke_timer_schedule and iyke_timer_list.

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 mentions 'No-op if already fired or cancelled', which provides guidance on when it's safe to call. However, it does not explicitly state when to use this tool over alternatives, though the context is clear from the name.

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