finance_expense_log

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

With no annotations provided, the description carries full disclosure burden but only states 'Create' without clarifying side effects (persistent storage vs temporary formatting), idempotency, or what the return value contains.

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?

Single sentence is appropriately concise, but 'formatted' and 'for tracking' create ambiguity without adding specific operational clarity. Structure is adequate but content under-delivers.

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 mutation-implied tool with no annotations and no output schema, description inadequately explains data persistence, storage location, or success/failure indicators. Should disclose what happens to the created entry.

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 coverage is 75% (3/4 params described), which meets baseline. Description adds minimal semantic value beyond schema—doesn't explain currency defaults, category implications, or that amount expects positive values.

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 basic action (Create) and resource (expense entry), but is ambiguous about scope (local formatting vs persistent storage) and fails to differentiate from sibling finance_invoice_generator or clarify relationship to finance_portfolio_tracker.

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?

Provides no guidance on when to use this tool versus alternatives like finance_invoice_generator for business expenses, nor prerequisites like whether it integrates with portfolio tracking or requires specific setup.

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