Log a new expense in OurFamilyWizard with its amount and description to maintain an accurate record of shared costs.
Log a new expense in OurFamilyWizard
| Name | Required | Description | Default |
|---|---|---|---|
| amount | Yes | Expense amount | |
| description | Yes | Expense description |
Changes observed during successful MCP inspections.
v2.8.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide destructiveHint=false, indicating non-destructive action. Description does not add behavioral details such as whether it creates a new record, what it returns, or any side effects. The agent may need more context about the operation.
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, front-loaded with verb and object. Every word earns its place; no unnecessary fluff.
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?
Simple tool with two required params and no output schema. Description is minimal but covers the core action. However, it lacks details on return value or post-creation behavior, which could be useful for a new expense action.
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 100% with descriptions for both parameters. Description does not add additional meaning beyond the schema, so baseline score of 3 is appropriate.
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?
Description states verb 'Log' and resource 'expense' clearly. However, it does not differentiate from sibling tools like ofw_list_expenses or ofw_get_expense_totals, missing a chance to clarify its unique action.
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 guidance on when to use this tool versus alternatives like updating or deleting expenses. No prerequisites or context provided, leaving the agent to infer usage.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.