PayPls MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool checks transaction status but doesn't describe what 'status' entails (e.g., pending, confirmed, failed), potential latency, error conditions, or if it's a read-only operation. This leaves significant gaps for an agent to understand the tool's behavior.

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, clear sentence with zero wasted words. It's front-loaded with the core purpose ('Check the status of a transaction'), making it highly efficient and 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 the tool's low complexity (one parameter) and high schema coverage, the description is minimally adequate. However, with no annotations and no output schema, it fails to explain what the status check returns (e.g., success/failure states, confirmation details), which is a notable gap for a tool that likely provides critical feedback on transaction outcomes.

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 description coverage is 100%, with the single parameter 'transaction_id' fully documented in the schema as 'The transaction ID returned from wallet_send_btc or wallet_send_usdc.' The description adds no additional meaning beyond this, so it meets the baseline score of 3 for high schema coverage without extra param info.

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 with a specific verb ('Check') and resource ('status of a transaction'), making it immediately understandable. However, it doesn't explicitly differentiate this tool from its siblings (like wallet_send_btc or wallet_send_usdc), which also involve transactions but for sending rather than checking status.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing a transaction ID from a previous send operation), exclusions, or how it relates to sibling tools like wallet_send_btc or wallet_send_usdc, which generate the transaction IDs this tool checks.

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