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

Beyond annotations, the description discloses important behavior: the link is one-time, expires within an hour, contains no secret, and is safe to show the human. It also clarifies that routine URL/token should be pasted on the page rather than in chat, which is useful operational 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 front-loaded with the key concept and each sentence contributes useful context: purpose, human action, safety, expiration, and the answering_brief reference. It is somewhat conversational and could be tighter, but there is little wasted content.

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?

With one fully described parameter and no output schema, the description covers the essential behavior an agent needs: what the link is for, that it is one-time and time-limited, and how the human uses it. An explicit statement that the tool returns the link URL would make it fully complete.

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 single secret parameter is fully documented in the schema, so the description need not repeat it. The description adds related safety guidance about secrets and chat, but not parameter-level syntax or selection details beyond the schema, so 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 establishes the resource as a one-time link that lets a human connect a Claude routine to the line, and it mentions the related answering_brief sibling. It stops short of a crisp verb-first statement like 'creates a link,' but the purpose is still readily inferable.

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?

It gives clear usage context: the human pastes the routine URL and token on the page, the link works once within an hour, and answering_brief provides steps and the routine's words. It does not enumerate when-not conditions or compare against listing_link/alerts_link, but the scenario is well defined.

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