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

With no annotations, the description carries the full burden, and it does disclose the return contents and diagnostic purpose of this read. It omits the safety profile (that it is read-only), authentication expectations, and what 'recent' means in time or count, so the behavioral picture is only partially covered.

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 short sentences, front-loaded with what the tool returns and followed by the trigger condition. Nothing is repeated from the schema and no sentence is filler.

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?

Absent an output schema and annotations, the description still tells the agent what a call yields and why to make it, which is adequate for a simple 3-param, zero-required list tool. Missing time-window and auth notes are minor gaps covered elsewhere or low-impact.

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 coverage is 67%: the status enum is fully self-documented in the schema, but limit has no description anywhere and the description never explains ordering, default window, or the api_key authentication path. The single word 'Recent' is the only semantic hint added beyond the schema.

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 and resource ('Recent webhook deliveries to your endpoint') and enumerates what is returned (status, attempts, last error). It does not distinguish itself from the sibling test_webhook, which an agent could plausibly confuse with it when diagnosing webhooks.

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?

'Use when pushes seem to be missing' gives a concrete triggering condition rather than leaving usage implied. It stops short of naming the alternative (test_webhook) or stating when not to use it, so it is clear context without explicit routing.

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