compare_budget_vs_expenses

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It only mentions 'real-time' and 'AND' combination, but does not state that the operation is read-only, how it handles missing budgets, or any rate limits or permissions. This is insufficient for a tool with zero annotation support.

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?

Two concise sentences front-load the purpose and provide the key filter combination rule without any filler. Every word 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?

The tool has a full output schema, so return values are covered. The description adequately covers the purpose and filter behavior, and the parameter schema is complete. However, it lacks usage differentiation from sibling tools, so it's not fully complete. A 4 is appropriate.

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 schema has 100% description coverage for all 5 parameters, so the baseline is 3. The description adds meaningful semantic value by clarifying that all provided filters are combined using AND, which is not apparent from individual parameter descriptions. This earns a 4.

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?

The description clearly states a specific verb ('Get') and a concrete resource ('real-time spending status compared against active budgets on a given reference date'), which distinguishes it from sibling tools like list_expenses or financial_health_score.

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?

No explicit guidance is provided on when to use this tool versus siblings such as expense_summary or financial_health_score. The only usage hint is the AND filter combination, but there is no mention of scenarios or exclusions.

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