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cancelProposal

Cancel a pending proposal for all participants, preventing any bookings. For individual declines, use respondToProposal instead.

Instructions

Use this tool when the organizer needs to withdraw an entire proposal — cancelling it for all participants so no booking can result. Only proposals with status "pending" can be cancelled. Important: this is not the tool to use when a single participant wants to decline. If one participant wants to say no while others continue, call respondToProposal with status="rejected" for that participant instead.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
proposalIdYesUUID of the proposal to cancel.
Behavior4/5

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

No annotations are provided, so the description carries the full burden. It discloses that only pending proposals can be cancelled and that cancellation affects all participants. However, it does not mention whether the action is reversible or any post-cancellation behaviors, leaving minor gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise—two sentences plus a clarifying note—with no redundant or unnecessary words. Every sentence adds value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (one parameter, no output schema), the description is complete: it covers purpose, usage, preconditions, and alternatives. No additional information is needed for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% with a clear description for proposalId. The description adds no extra parameter details beyond what the schema provides, so a baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'withdraw' (cancel) and the resource 'proposal', and explicitly distinguishes it from the sibling 'respondToProposal' for single participant rejection. It specifies that it cancels the entire proposal for all participants.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It provides explicit when-to-use (organizer withdraws entire proposal, only pending status) and when-not-to-use (single participant decline) guidance, and directs to the alternative tool 'respondToProposal'.

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

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