SpherePay MCP Server

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

No annotations are provided, so the description carries full burden. It mentions the return includes 'deposit instructions,' which adds some behavioral context beyond basic retrieval. However, it lacks details on permissions, rate limits, error handling, or whether it's idempotent—critical for a tool with no annotation coverage.

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 a single, efficient sentence with zero waste. It front-loads the core action and resource, then adds return details. Every word contributes to understanding without redundancy.

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 one parameter, no annotations, and an output schema (which handles return values), the description is reasonably complete. It covers the purpose and hints at return content. However, for a tool with zero annotation coverage, more behavioral details (e.g., safety, errors) would enhance completeness.

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. It specifies the parameter is 'by ID,' clarifying the virtual_account_id's purpose, but doesn't detail format (e.g., string pattern) or constraints. This adds minimal semantics beyond the schema's type definition, meeting the baseline for partial compensation.

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 action ('Retrieve') and resource ('SpherePay virtual account by ID'), making the purpose understandable. It distinguishes from list operations (like list_virtual_accounts) by specifying retrieval of a single account. However, it doesn't explicitly differentiate from other get_* tools (e.g., get_bank_account, get_customer) beyond the resource name.

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 is provided on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing a valid virtual_account_id), compare with list_virtual_accounts for browsing, or specify error conditions. The description assumes the context but offers no explicit usage rules.

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