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

The description adds real context beyond the annotations: it scopes the blast radius (no store data affected) and explains why no rollback is needed. That meaningfully informs the agent beyond destructiveHint=true and openWorldHint=true. It stops short of saying whether a cancelled change can be re-scheduled and whether failures (e.g., change already ran) surface as errors.

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 short sentences, front-loaded with the action and its precondition, then the consequence. Nothing is repeated and nothing padding-like is present.

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 cancellation tool with annotations and no output schema, the description covers precondition, effect, and non-effect on store data. Minor gaps remain: no statement of the outcome/error on an already-executed change and no confirmation/irreversibility note about recreating the schedule.

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% – both 'id' (with its pointer to list_scheduled_changes) and 'store' are documented in the schema. The description adds no parameter-level meaning, 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?

States a specific verb and resource ('Cancels a change') plus a scope qualifier ('that hasn't run yet'), which is enough to distinguish it from undo_change in practice. It never names the sibling explicitly, so an agent must infer the boundary from the 'hasn't run yet' clause.

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 precondition ('hasn't run yet') is stated and the 'nothing to undo' remark implicitly points at undo_change as the alternative for changes that already ran. However, there is no explicit when-to-use statement, no mention of using list_scheduled_changes to obtain the id, and no guidance on what to do if the change already executed.

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