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

The description adds useful behavioral context beyond annotations: the operation is reversible, requires the user's API key, and mirrors the dashboard Save button. Since destructiveHint=false already signals non-destructive behavior, the description further clarifies the mutation's scope and side effects, though it does not detail what happens on repeated calls or invalid grant IDs.

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 short sentences with no filler. The core action is front-loaded, and each sentence earns its place by adding scope, reversibility, auth context, or a familiar UI analogy.

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?

For a simple two-parameter tool with full schema coverage and annotations, the description is almost complete. It covers purpose, reversibility, auth, and user scope; the only minor gap is the lack of any indication of return/response behavior since there is no output schema.

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 the schema fully documents grant_id and status, including the enum values and default. The description mentions 'pursuing/applied' and 'save', which aligns with the status parameter, but it adds no meaning beyond what the schema already provides.

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 states a specific action ('Save a grant to YOUR pipeline') and the alternative mode ('set its status to pursuing/applied'), clearly identifying the resource and scope. It also distinguishes itself from read/list siblings by emphasizing the personal pipeline and the dashboard Save button behavior.

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 gives clear context on when to use this tool: to save a grant or update its pipeline status. It notes the API key requirement, but it does not explicitly exclude alternatives such as dismiss_grant or explain when to choose status values, so it stops short of full when/when-not guidance.

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