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

The annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description's only added behavioral value is enumerating the returned fields, which is genuinely useful given no output schema, but it says nothing about ordering, retention window, or pagination semantics beyond what the schema implies.

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?

It is a single short fragment with no filler, which is efficient, but it is structurally a label rather than a sentence: it omits the verb and leads with a noun phrase that reads as a restatement of the tool name.

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 an eight-parameter list tool with no output schema and partial schema coverage, the description is thin: it does not explain pagination defaults (limit 100 / max 500), the period enum including the custom date_from/date_to pairing, or what a result set row represents. An agent could call it, but not confidently filter it.

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?

With 8 parameters and only 63% schema description coverage, offset, status, and click_id are undocumented in both places. The description adds no meaning to any filter – it never mentions period windows, status filtering, or how campaign/click_id narrow results – so it fails to compensate for the coverage gap.

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 identifies a specific resource – outgoing postback attempts to traffic-source/campaign postback URLs – and names the fields returned (HTTP code, attempt number, error). However, it is a bare noun phrase with no verb, and it never explicitly contrasts itself with the sibling list_postbacks, so the agent must infer that this returns attempt logs rather than postback configuration.

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?

There is no when-to-use guidance, no prerequisites, and no mention of the obvious alternative (list_postbacks). The agent gets no signal about which of the two to call when investigating delivery problems versus configuration.

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