Create Action Plan Item Assignee

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

Annotations already indicate a non-read, non-destructive creation operation. The description adds that it returns 'the created object on success (HTTP 201)', which aligns with annotations. It does not contradict annotations, but provides minimal additional behavioral context beyond what the HTTP method implies.

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 verbose and includes redundant information, such as the endpoint path which is already implied by the tool name and context. The repeated phrase 'Creates a new Action Plans' is incorrect and adds unnecessary length. A more concise description would improve clarity.

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?

The description covers parameter behavior (conditional requirement) and mentions the success response, but lacks details on the return structure since no output schema is provided. Given the tool complexity (6 parameters, no nested objects) and many sibling tools, the description is adequate but not fully comprehensive.

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?

With 100% schema description coverage, baseline is 3. The description adds valuable clarification about the conditional requirement of party_id and role ('at least one of the two needs to be passed in'), which is not fully captured by the schema's 'required' marking. This extra meaning justifies a higher score.

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 verb 'Create' and resource 'Action Plan Item Assignee'. However, it contains a confusing phrase 'use this to create a new Action Plans' which incorrectly refers to a different resource, slightly muddying the purpose. Overall, it effectively identifies the action and resource.

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 provides a helpful NOTE about the conditional requirement for party_id and role, indicating when to use each. However, it does not explicitly contrast this tool with siblings like bulk_create_action_plan_item_assignees or list_action_plan_item_assignees, nor does it state 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.