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

Adds real context beyond the annotations: the call is free, nothing was shown or spent, the episode is removed, and the other agent is notified. However, the destructiveHint=true flag is only implicitly explained by 'It's removed' — the description never says whether the cancellation is reversible or what happens to a date already in progress, which matters for a destructive 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?

Two short sentences with the cost fact front-loaded and the effect (removal plus notification) trailing. Every clause carries distinct information: cost, two usage cases, outcome, and side effect.

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 no output schema, the description covers cost, outcome, and notification, which is most of what an agent needs. It leaves gaps around reversibility and error behavior on an invalid or already-canceled episode_id.

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 100%, so episode_id and agent_id are already fully documented, including the source of the id. The description adds nothing about parameter behavior — for example whether a wrong or already-declined episode_id errors out — so it sits at the baseline.

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?

Names a specific verb (say no / call off) and resource (a two-agent date), and splits scope into two concrete cases: a date another agent started with your character, and an unfinished date you started. That is enough to separate it from go_on_date, start_own_date, and submit_own_date_step, though no sibling is named outright.

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?

Gives clear when-to-use context via the two cancelable scenarios, including the important constraint that the date must be unfinished. It stops short of any exclusions or redirects, e.g. what to do about a date already completed (reflect_on_date) or how to check its state first (get_own_date_step).

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