Generates unsigned ERC-20 approval and pool supply transaction calldata for depositing an asset into Aave v3 (Ethereum, Arbitrum, Base) or Spark (Ethereum). Call this when the agent has decided to supply collateral or earn supply APY on a lending protocol; precede it with lending.rates.query to c...
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AI agents call lending.supply to retrieve information from Syenite without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though lending.supply only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"lending.supply": {}
}
}See the full Syenite policy for all 46 tools.
These attack patterns abuse exactly the kind of access lending.supply gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Generates unsigned ERC-20 approval and pool supply transaction calldata for depositing an asset into Aave v3 (Ethereum, Arbitrum, Base) or Spark (Ethereum). Call this when the agent has decided to supply collateral or earn supply APY on a lending protocol; precede it with lending.rates.query to confirm the target protocol and chain. Provide protocol ("aave-v3" or "spark"), chain, asset symbol (e.g. "WETH", "USDC"), human-readable amount, and onBehalfOf wallet address. Returns two transaction requests — the ERC-20 approval must be submitted first, then the supply call — and a verification reminder to use tx.receipt and lending.position.monitor after submission. Syenite never holds private keys; no funds move until the caller signs and broadcasts.. It is categorised as a Read tool in the Syenite MCP Server, which means it retrieves data without modifying state.
Register the Syenite MCP server in PolicyLayer and add a rule for lending.supply: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Syenite. Nothing to install.
lending.supply is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the lending.supply rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for lending.supply. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
lending.supply is provided by the Syenite MCP server (@syenite/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 46 Syenite tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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