pingen_letter_events

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

With no annotations, the description carries the full burden of behavioral disclosure. It adds value by enumerating event types (created, submitted, sent, delivered, undeliverable), giving a sense of what the tool returns. However, it does not explicitly state that the operation is read-only, nor does it describe response format, pagination, or ordering.

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 a single sentence that is front-loaded with the core purpose and includes relevant examples. Every word contributes meaning, with no fluff or redundancy.

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 tool with one parameter and no output schema, the description gives enough to understand the basic function. However, it omits details about the return structure (e.g., whether it returns a list of events, timestamps, or statuses) and potential error conditions. This is acceptable for basic use but leaves gaps for an agent.

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?

The schema has 0% description coverage, so the description must compensate for the sole parameter 'letter_id'. The phrase 'of a letter' implicitly indicates that the parameter identifies the letter whose history is being retrieved, but it does not explicitly state the parameter name, type, or constraints. This is adequate for a single obvious parameter but not exemplary.

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 clearly identifies this as a tracking/status history tool for letters, listing example event types. It distinguishes itself from sibling tools like pingen_status (which likely provides current status) by emphasizing 'history' and 'events'.

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?

No guidance is provided on when to use this tool versus alternatives. It does not mention that pingen_status is for current status or that pingen_get_letter is for details. The reader must infer usage from the tool name and description.

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