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

Annotations provide key behavioral traits (not read-only, open-world, non-idempotent, not destructive). The description adds that renewal requires a prior quote id and an approved budget, which clarifies a precondition. However, it doesn't explain side effects, permission requirements, or what happens to the original quote. It goes beyond annotations slightly but misses deeper behavioral context.

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 very concise, using two short sentences. It front-loads the key requirement (quote id and budget) and the consequence of missing a quote id. It is efficient, though the phrasing is somewhat terse and could be slightly clearer without losing brevity.

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?

Given four parameters (three required), no parameter descriptions, and an existing output schema, the description covers the essential precondition (quote id) but does not address the roles of budget, budget_approved_by, or decision_id. It provides enough context to understand the core dependency but leaves the agent needing to infer details from the schema alone.

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%, meaning the description must compensate. It explains that prior_quote_id comes from the retailer's program and that budget must be approved, adding meaning to two of four parameters. However, it does not clarify decision_id (optional) or the format of budget_approved_by, leaving gaps for those parameters.

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 name and title state 'Renew Package' and the description implies renewing a quote to a new budget. However, the description is abstract and doesn't clearly define what a 'package' is or how this tool differs from siblings like quote_package or list_packages. The purpose is inferable but not explicitly stated in a specific verb+resource form.

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 says a quote id is required, which hints at a prerequisite, but it doesn't specify when to use this tool versus alternatives such as quote_package (new quote) or list_packages. There is no explicit when-to-use or when-not-to-use guidance, leaving the agent to infer context from the name and dependency alone.

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