Discounts: campaign plan

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

Adds important context beyond annotations: 'sends nothing and charges nothing' and behavior when no active plan (empty response). No contradiction with 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?

Two sentences, front-loaded with purpose, then usage details. No wasted words. Every sentence adds value.

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 low complexity, annotations present, and no output schema, the description covers purpose, behavior, edge cases, and disambiguation. Complete for this tool.

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?

No parameters in schema. Description explicitly states 'no parameters', which is sufficient and aligns with baseline of 4 for zero-parameter tools.

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?

Clearly states it returns info about discount campaign plan with specific fields (sendsLeft, totalSends). Distinguishes from sibling tools _available and _stats.

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?

Explicitly says read-only, no parameters, no side effects (sends nothing, charges nothing), and tells when response is empty. Advises not to confuse with other related tools.

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