apex_add_collapsible_region

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

Annotations are all false, so no safety hints are provided. The description adds the 'toggle' behavior, which is useful context, but it does not disclose other traits such as non-idempotency (covered by idempotentHint false) or potential side effects. Minimal extra value beyond the annotations.

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 single-sentence description is concise and front-loaded with the action. It earns its place, but given the tool has 7 parameters, a bit more detail could be useful without sacrificing conciseness.

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, combined with the detailed input schema and output schema, covers the basic operation. However, it lacks usage context and behavioral nuances, such as whether content_sql overrides content_html or how the toggle interacts with the region. For a simple create tool, it is acceptable but not 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?

Schema description coverage is 86%, meaning the input schema already documents most parameters. The description does not add any parameter semantics beyond what the schema provides, 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 'Add a collapsible/expandable region with toggle' uses a specific verb (Add) and resource (collapsible/expandable region), and the phrase 'with toggle' clearly differentiates it from siblings like apex_add_region. It directly states what the tool does without ambiguity.

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 usage scenario (adding a collapsible region) but provides no explicit guidance on when to choose this over alternatives like apex_add_region or apex_update_region. No exclusions or prerequisites are mentioned, leaving the agent to infer based on the name.

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