Create a free AnyHook endpoint (no account needed)

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

With no annotations provided, the description carries the full behavioral burden and does so thoroughly. It discloses the ephemeral nature, the auto-connection side effect to the MCP session, the self-deletion of unclaimed workspaces, and the 7-day expiration, which are exactly the behavioral traits an agent needs to know.

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?

Every sentence earns its place: it front-loads the core action, lists return values, explains the claim/expiration lifecycle, and notes the session auto-connect. It is information-dense without being verbose.

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?

Despite lacking an output schema, the description explicitly names the three return fields and their meaning. It also covers lifecycle, side effects, and follow-up actions, making the definition complete for an agent to invoke the tool correctly with zero required parameters.

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%, and the schema already explains both optional parameters ('source' and 'destination_url'). The description adds no additional parameter-level detail, so the baseline of 3 is appropriate; the schema does the heavy lifting.

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 uses a specific verb ('creates'), names the resource (free ephemeral relay endpoint plus API key), and clearly differentiates this from siblings by emphasizing zero-config bootstrap with no signup. It also enumerates the exact return fields, leaving no ambiguity about what the tool does.

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 gives clear usage context: use this when you need a quick, account-free endpoint, then relay the claim_url before the session ends and note the 7-day expiry. It does not explicitly name alternative sibling tools or state when not to use them, but the context is strong enough for an agent to make a reasonable selection.

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