vaultpilot-mcp

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states the transaction is 'unsigned' which is useful context, but doesn't mention what happens next (needs signing/broadcasting), whether this requires wallet connectivity, or any rate limits. The description adds some value but leaves significant behavioral gaps for a transaction-building 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 perfectly concise with two sentences that each earn their place: the first states the core purpose, the second provides crucial parameter guidance. No wasted words, well-structured and front-loaded with the main functionality.

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?

For a transaction-building tool with 4 parameters, no annotations, and no output schema, the description is moderately complete. It covers the core purpose and key parameter guidance but lacks information about what the tool returns, error conditions, or integration with other tools like send_transaction. Given the complexity, it should provide more context about the transaction lifecycle.

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?

With only 25% schema description coverage (only the 'amount' parameter has a description), the description compensates well by clarifying the 'amount' parameter format ('human-readable amount like "0.5"'). However, it doesn't explain the semantics of 'wallet', 'chain', or 'to' parameters beyond what the schema patterns/enums provide.

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 specific verbs ('build an unsigned native-coin send transaction') and resources ('ETH on Ethereum/Arbitrum'). It distinguishes itself from sibling tools like prepare_token_send (for tokens) and prepare_tron_native_send (for Tron network) by specifying native coins on specific chains.

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 context by specifying the type of transaction (native-coin send) and chains (Ethereum/Arbitrum), but doesn't explicitly state when to use this versus alternatives like prepare_token_send or prepare_swap. No guidance on prerequisites or when-not-to-use scenarios is provided.

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