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 tool 'creates' (implying mutation) and describes the auto-conversion behavior, but lacks critical details like permissions required, whether this is irreversible, rate limits, or what the output contains (though an output schema exists). The description adds some context but is incomplete for a creation tool.

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 efficiently structured in two sentences: the first states the purpose, the second details parameters with examples. Every element serves a clear purpose with zero redundant information, making it easy to parse.

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 no annotations, 0% schema coverage, and an output schema (which handles return values), the description is moderately complete. It covers the core functionality and most parameters but misses behavioral details like error conditions or side effects. For a creation tool with mutation, it should ideally include more about consequences or prerequisites.

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 provides semantic meaning for 5 parameters (source_currency, destination_currency, network, wallet_address, integrator_bps_fee) including examples and defaults, but omits 'customer_id'. This adds significant value beyond the bare schema, though one parameter remains undocumented.

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 specific action ('Create a virtual account') and its purpose ('for automatic fiat-to-stablecoin conversion'), distinguishing it from sibling tools like 'get_virtual_account' (retrieval) or 'setup_funding' (different setup). It explicitly mentions the key functionality of providing bank deposit instructions with auto-conversion.

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?

The description implies usage for setting up automated conversion accounts but doesn't explicitly state when to use this vs. alternatives like 'setup_funding' or 'get_virtual_account'. No guidance is provided on prerequisites (e.g., customer must exist) or exclusions (e.g., not for manual transfers).

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