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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description adds genuine context beyond that: results are 'most recent first' and scoped to the caller's own instances with IPs exposed. It still says nothing about pagination behavior or result limits, which matters for a list endpoint.

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?

Three short sentences, front-loaded with the action, and no filler. Slight redundancy in repeating 'FeelingSurfViewer sessions' in each sentence, but nothing that wastes meaningful space.

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 zero-required-parameter, read-only list tool with full schema coverage and annotations covering safety, the description supplies the remaining essentials: whose sessions, what ordering, and what data (IPs) is returned. No output schema exists, so a brief note on return shape would be the only meaningful addition.

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 100%, with limit and offset fully documented including clamping and defaults, so the schema carries this dimension. The description adds no parameter meaning (no mention of paging, ordering interaction with offset, or max page size), leaving it at the baseline.

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 ('List your FeelingSurfViewer sessions') and clarifies the scope: the caller's own sessions on the earning side, with their IPs. It is distinguishable from the sibling set, which contains no other session-listing tool, though it never contrasts itself with list_* alternatives like list_sites or list_proxies.

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 alternatives. The agent must infer usage from the name alone, which is adequate for a simple listing tool but falls short of explicit routing guidance.

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