Robyn — Gasless Cross-Chain for AI Agents

Quote a spend from yield

robyn_yield_quote

Read-only JIT quote: how a spend would be fulfilled from an agent's Aave yield venue (draw <= your allowance -> Aave/Moonwell withdraw -> gasless deliver). Moves nothing.

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": {
      "agent": "<agent>",
      "srcChain": "<srcChain>",
      "amount": "<amount>"
    },
    "name": "robyn_yield_quote"
  }
}

Input Schema

Name	Required	Description
`agent`	Yes
`amount`	Yes	USDC base units (6dp)
`toChain`	No
`srcChain`	Yes
`toAddress`	No

Schema Changelog

Changes observed during successful MCP inspections.

AddedJul 17, 2026

TDQS

B3.4/5.0

Behavior4/5

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

With no annotations, description clearly states 'Read-only' and 'Moves nothing', confirming no side effects. It also outlines the fulfillment flow (draw, withdraw, deliver), providing useful behavioral context beyond just idempotency.

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

Conciseness5/5

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

The description is two sentences, front-loading 'Read-only JIT quote' and avoiding redundancy. Every part adds value.

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?

Given no output schema and 5 parameters, the description is incomplete. It does not explain return value structure, error conditions (e.g., insufficient allowance), or constraints on parameters like 'toChain' or 'toAddress'.

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 only 20% (amount only). The description does not clarify most parameters (agent, srcChain, toChain, toAddress) beyond what the schema provides. It hints at 'draw <= allowance' and 'Aave/Moonwell' but does not explicitly map to parameters.

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?

Description clearly states 'Quote a spend from yield' and explains it is a read-only JIT quote. The verb 'quote' and resource 'yield venue' are specific. While it distinguishes from sibling 'robyn_yield_spend' (actual spend), it does not explicitly differentiate from generic 'robyn_quote'.

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

Usage Guidelines3/5

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

Description indicates usage for quoting without moving funds ('Read-only', 'Moves nothing'). However, it lacks explicit when-not-to-use or alternative tools, such as comparing to 'robyn_yield_spend' for execution.

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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