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

With no annotations, the description carries the full burden and mostly succeeds: it discloses cost (free), inputs (none), and a detailed returns inventory, and 'reports whether the service is up' clearly implies a non-destructive read. It does not mention auth requirements, rate limits, or failure/error behavior, which keeps it short of a 5.

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?

One lead sentence followed by tight, labeled bullets for cost, inputs, returns, and next steps. Zero filler and every line earns its place.

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?

No output schema exists, so the description compensates by enumerating the return payload (DB import health, rule set version, commit, cache/RPC/spend counters, payer-identity mode). For a zero-param, annotation-free health endpoint, nothing an agent needs is missing.

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 document; the description's explicit 'Inputs: none' matches the empty schema. Baseline 4 applies for a 0-param tool.

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: reports whether the service is up, plus diagnostics. No sibling tool does anything similar, and the one-line summary front-loads the purpose unambiguously.

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 'Next' bullet gives clear context (call this before starting a trade via tradeSearch), and the zero-cost note signals it is safe to call freely. It does not state any when-not or alternatives, but no alternative exists among the siblings.

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