SpherePay MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions 'Shows deposit activity and conversion history,' which hints at output content, but lacks details on permissions, rate limits, pagination behavior (implied by page/limit parameters but not explained), or error handling. For a read operation with no annotations, this is insufficient.

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?

The description is appropriately sized and front-loaded: two concise sentences with zero waste. The first sentence states the core purpose, and the second adds valuable context about what the listing includes, making it efficient and well-structured.

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?

Given the tool's moderate complexity (3 parameters, 1 required), no annotations, and an output schema present (which likely covers return values), the description is partially complete. It clarifies the tool's focus but lacks guidance, parameter details, and behavioral context. The output schema reduces the need to explain returns, but overall completeness is minimal.

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 0%, so the description must compensate, but it adds no parameter-specific information. It doesn't explain what 'virtual_account_id' is, how to obtain it, or the meaning of 'page' and 'limit' (e.g., pagination defaults or ranges). The description's mention of 'deposit activity and conversion history' relates to output, not input parameters.

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 the tool's purpose: 'List transfers for a specific virtual account' specifies the verb (list) and resource (transfers), with 'for a specific virtual account' providing scope. It distinguishes from generic 'list_transfers' by focusing on virtual accounts, though it doesn't explicitly compare to siblings like 'get_transfer' or 'list_virtual_accounts'.

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 on when to use this tool versus alternatives is provided. The description implies usage for viewing deposit activity and conversion history, but it doesn't mention when to choose this over 'list_transfers' (which might list all transfers) or 'get_transfer' (which might retrieve a single transfer), nor does it specify prerequisites or exclusions.

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