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lends-mcp-server

lends-mcp-server

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by LendsProtocol
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Lends Prepare Approve Collateral

lends_prepare_approve_collateral
Read-onlyIdempotent

Build an unsigned collateral approval transaction for LENDS protocol. Specify collateral token address and amount to authorize lending or borrowing.

Instructions

Construct collateral approval for the LENDS protocol.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "collateral": "<collateral>",
      "amount": "<amount>"
    },
    "name": "lends_prepare_approve_collateral"
  }
}

Input Schema

NameRequiredDescriptionDefault
amountYes
collateralYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The word 'construct' implies building an approval payload rather than executing an on-chain transaction, which is useful, but the description does not explicitly state that no transaction is submitted or describe side effects beyond what the annotations imply.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single short sentence with no filler and front-loads the core purpose. It is concise, though slightly too terse to be fully informative on its own.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 0% schema coverage and no output schema, the description is too thin. It lacks information about return value, parameter meaning, and when this collateral approval builder should be chosen over the numerous sibling prepare tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description carries the burden of explaining the parameters, but it only references 'collateral' indirectly and says nothing about 'amount'. The patterns in the schema show collateral is an address and amount is a numeric string, but units, token decimals, and the relationship between the parameters are left unexplained.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action ('Construct collateral approval') and scopes it to the LENDS protocol. It is distinguishable from sibling prepare_approve_* tools by the 'collateral' qualifier, though it does not explicitly explain what the approval is for or how it differs from the other approval builders.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is given about when to use this tool versus the many sibling prepare_approve variants, such as approve_leusd_for_repay or approve_usdg_for_psm. The agent must infer from the tool name alone, and no exclusions or alternatives are mentioned.

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

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