beta_testers_builds_create_to_many_relationship

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

With no annotations provided, the description carries the full behavioral burden. It implies a mutation via POST but does not disclose whether it appends to or replaces the existing builds relationship, what permissions are required, whether it is idempotent, or what happens on conflicting ids. The pointer to an external OpenAPI schema is a reference, not behavioral disclosure.

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 short and front-loaded, but it wastes space by repeating the identical path twice in parentheses and then defers the body shape to an external schema. It is efficient in length yet redundant in content, with no wasted-but-earned elaboration.

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?

This is a mutation tool with a nested JSON:API body, no annotations, and no output schema. The description should therefore explain the relationship semantics and envelope expectations, but instead points the agent to an external OpenAPI component that may not be available at call time. For a nested-body write operation this is insufficient.

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%, so both the 'id' and 'body' parameters are already documented in the schema, and the description adds nothing beyond naming the external request schema (BetaTesterBuildsLinkagesRequest). Baseline 3 applies when the schema does the heavy lifting; the description offers no format or syntax detail for the nested body.

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 is essentially a raw HTTP method + path (POST /v1/betaTesters/{id}/relationships/builds), which does convey a specific resource and an additive relationship operation. However, it never states in prose what the tool does (e.g. 'add builds to a beta tester's build relationship'), and it does nothing to distinguish itself from sibling create-to-many tools like beta_groups_builds_create_to_many_relationship. The purpose is inferable from the URL but not articulated.

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?

There is no guidance about when to use this tool versus the get_to_many_relationship or delete_to_many_relationship siblings that share the same path. No prerequisites, no mention of needing an existing beta tester id, no context about the relationship semantics. Usage is left entirely to inference from the name.

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