update_target_list

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

With no annotations provided, the description bears the full burden. It discloses that only non-null fields are sent, which is a key behavioral trait. However, it does not mention side effects, idempotency, permission needs, or what happens to omitted fields, leaving significant gaps.

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 at two sentences, but it sacrifices completeness. It is front-loaded with the main action, but the second sentence is a minor behavioral note. It could be restructured to include more critical information without adding length.

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?

Given the tool has 5 parameters, no output schema, and no annotations, the description is inadequate. It fails to describe return values, error conditions, or field details. For a mutation tool, this level of description is insufficient for an agent to use it reliably.

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 0% description coverage and the description barely adds meaning. It says 'Update mutable fields' but does not list which fields are mutable or explain the purpose of each parameter. The agent must infer from parameter names alone, which is insufficient.

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 action: 'Update mutable fields of an existing target list.' It distinguishes from sibling tools like create_target_list and get_target_list by using the verb 'update' and specifying the resource. The additional note 'Only non-null fields are sent' provides behavioral detail.

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 implies the tool is for updating existing target lists, which differentiates it from create/delete/get siblings. However, it does not explicitly state when to use it versus other tools or provide any exclusion criteria or context for when not to use it.

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