Provides a structured risk assessment for a specific DeFi yield opportunity before committing capital — covering smart contract risk, oracle configuration, governance model, liquidity and exit risk, depeg/peg risk, and position sizing relative to TVL. Call this after yield.opportunities when an a...
Part of the Syenite server.
Free to start. No card required.
AI agents invoke yield.assess to trigger processes or run actions in Syenite. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
yield.assess can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"yield.assess": {
"limits": [
{
"counter": "yield.assess_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Syenite policy for all 46 tools.
These attack patterns abuse exactly the kind of access yield.assess gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Provides a structured risk assessment for a specific DeFi yield opportunity before committing capital — covering smart contract risk, oracle configuration, governance model, liquidity and exit risk, depeg/peg risk, and position sizing relative to TVL. Call this after yield.opportunities when an agent or user wants to evaluate a specific protocol and product in depth rather than just comparing APYs. Provide protocol (e.g. "Aave v3", "Morpho", "Lido") and optionally product to disambiguate vaults, amount in USD to get position-sizing warnings, and asset to narrow matches. Returns a numeric risk score (1–10), per-dimension risk notes, projected annual and monthly yield for the supplied amount, and up to five comparable alternatives ranked by APY; does not execute any transaction.. It is categorised as a Execute tool in the Syenite MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Syenite MCP server in PolicyLayer and add a rule for yield.assess: 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.
yield.assess is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the yield.assess 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 yield.assess. 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.
yield.assess 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.
Free to start. No card required.
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