test_subscription

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

With no annotations, the description bears full responsibility for transparency. It discloses that the tool sends a signed test ping through the real delivery pipeline and that the effect is verifying the receiver works. It could be improved by mentioning whether the subscription is modified or if there are rate limits, but overall it provides sufficient behavioral context.

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 concise, consisting of two sentences. The first sentence clearly states the action, and the second provides follow-up guidance. No unnecessary 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?

For a simple tool with one parameter, no output schema, and no annotations, the description fully covers what the tool does, how to use it, and what to do after. It is complete and self-sufficient.

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 input schema has 100% coverage for the single required 'id' parameter, which is described as 'The subscription id (uuid).' The description does not add additional meaning beyond the schema, but given the high schema coverage, the baseline of 3 is appropriate.

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 the tool's purpose: sending a signed test ping through the real delivery pipeline to a subscription's callback URL to verify the receiver works. The verb 'send' and resource 'subscription's callback URL' are specific and distinguish it from sibling tools like create_subscription or get_subscription.

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 explicitly advises using this tool to test callbacks without waiting for real videos, and suggests checking get_subscription afterwards for the delivery result. This provides clear context for when to use it, though it does not explicitly mention when not to use it or list alternatives.

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