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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. With no output schema, the description carries the burden of disclosing returned content, and it does list the reported values (open flags, post-fee rate, share price, deposits, ready cash, fund location) — useful, though it does not specify units, formatting, or freshness/latency of the 'live' data.

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 sentence with the key noun phrase 'Obento's live state' front-loaded and the rest of the sentence spent enumerating the returned fields. It is a long colon-list, but every item earns its place by naming data the agent cannot otherwise discover.

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, annotation-covered read tool with no output schema, the description supplies the one thing missing from structured data: what state gets returned. Only minor gaps remain (units, snapshot timing, and how it relates to the 'position' sibling).

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 nothing for the description to disambiguate and no schema semantics to supplement. Baseline of 4 applies for a no-argument 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 resource ('Obento's live state') and enumerates the concrete fields it reports: deposit/withdrawal open flags, fee-adjusted yearly rate, obUSD share price, deposits, ready cash, and fund location. It is clearly a protocol-level status read, though it never explicitly distinguishes itself from the sibling 'position' tool, which an agent could easily confuse with it.

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 such as 'position' (user-level holdings) or 'read_docs'. An agent must infer on its own that this is the pre-deposit/pre-withdrawal health check.

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