Link existing TCR campaign

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

Annotations are all false, so description must carry behavior. It mentions it's a link operation (write) and lists errors, but lacks details on authorization, side effects, or what linking entails beyond the action. Adequate but not rich.

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 two sentences plus error codes, all front-loaded with purpose, alternative, prerequisite, and errors. No redundant 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 1-parameter tool with no output schema and no nested objects, the description provides sufficient context: what it does, when to use alternative, prerequisite, and potential errors.

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 with a well-described required parameter tcr_campaign_id. The description does not add extra meaning beyond the schema, so baseline 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 that the tool links an existing TCR campaign into the account, with specific verb 'Link' and resource 'campaign'. It directly distinguishes itself from msg_create_campaign, making the purpose unambiguous.

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 to use msg_lookup_campaign first to verify the TCR campaign ID, and contrasts with msg_create_campaign for creation. This provides clear when-to-use and when-not-to-use guidance.

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