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

Annotations already establish readOnlyHint, idempotentHint, and destructiveHint=false, so the safety bar is low. The description still adds real value by disclosing that the view does not approve or launch, preventing the agent from assuming a side effect, and by flagging the separate human-approval requirement.

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?

Three tight sentences with the primary action front-loaded, followed by two disambiguating boundary statements. No filler; each sentence contributes a distinct constraint.

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?

An output schema exists and annotations are rich, so the description needn't explain return values or the safety profile. It adequately covers purpose and scope boundaries; only the study_id parameter goes unexplained, which is low-risk.

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 0% and the description never mentions study_id, so it adds no semantics beyond the schema. The single required parameter is a self-explanatory UUID, which limits the harm, so a 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?

States a specific verb ('Open') and resource ('interactive, read-only view of the saved study plan and current fielding progress'), which clearly separates it from data-fetch siblings like get_study and get_fielding_progress. It does not name a sibling explicitly, but the 'interactive view' framing is distinctive.

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?

Clearly delimits scope with 'The view does not approve a plan or launch recruitment' and directs the agent to obtain human approval separately before fieldwork. This tells the agent when this tool is and isn't the right one, though it doesn't name a specific alternative tool to use instead.

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