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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world scope, so the safety profile is covered. The description adds essentially nothing beyond restating the as_at parameter as 'as at a given date' – no mention of what the report contains, currency/units, whether comparatives are included, or how a missing company resolves.

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 with no filler or repetition. It is efficiently sized, though the terseness is part of why other dimensions score low rather than being a conciseness flaw.

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?

Both optional parameters are fully documented in the schema and the read-only annotations cover safety, but with no output schema the description should say something about the report's contents (assets/liabilities/equity sections, period comparatives, currency) so the agent knows what it will receive.

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%: as_at is documented with format and default, and company is documented with a pointer to list_companies and fallback behavior. The description adds no meaning beyond that, so the baseline 3 applies.

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 ('Get Balance Sheet report') plus a scope qualifier ('as at a given date'), which is unambiguous about what the tool produces. It does not distinguish itself from close siblings such as get_trial_balance, get_profit_and_loss, or get_financial_snapshot, leaving the agent to infer the boundary.

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 guidance on when to choose this over get_trial_balance, get_profit_and_loss, or get_financial_snapshot, nor any prerequisites or exclusions. The only implicit hint is point-in-time reporting, which the agent must read into the phrase 'as at a given date'.

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