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

Annotations already declare readOnly, idempotent, openWorld, and non-destructive, so the safety profile is covered. The description adds genuinely useful behavioral context beyond that: the 5-minute refresh cadence and the availability of 24 h and 7 day uptime windows, which tells an agent how fresh and how historical the data is. It stops short of describing the return shape, which keeps it at 4.

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?

A single front-loaded sentence that names the subject first and then lists coverage, cadence, and history windows. Every clause carries information, though the component list is long enough that it reads as dense rather than crisp.

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-parameter, read-only health tool with no output schema, the description supplies what an agent needs to decide to call it: what is monitored, how often, and what historical windows exist. The only real gap is that it does not hint at the response structure, but with no output schema that is a minor omission.

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 tool takes zero parameters, so there is no parameter semantics to explain; the baseline of 4 applies. The description correctly reflects a no-argument call by not inventing any filtering or scoping inputs.

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 resource (live health of TOLLA) and enumerates exactly what is covered: API, booth gateway, both x402 facilitators, Robinhood Chain RPC, and x402 index. The verb is implicit ('live health of') rather than an explicit action, and it never distinguishes itself from the sibling network_stats, so it falls short of a 5.

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?

The framing as 'live health' with a 5-minute check cadence implies a status/uptime use case, but there is no explicit when-to-use or when-not-to-use guidance, and no routing against the closely named sibling network_stats. Usage is inferable rather than stated.

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