Fetches up to 10 swap or bridge quotes in a single batched call, executing all route lookups in parallel and returning each result alongside a total cost summary. Use this when splitting funds across multiple chains, executing multi-leg portfolio rebalancing, or comparing routes side-by-side with...
Risk signalsHigh parameter count (10 properties)
Part of the Syenite server.
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AI agents call swap.multi 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 swap.multi 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": {
"swap.multi": {}
}
}See the full Syenite policy for all 46 tools.
These attack patterns abuse exactly the kind of access swap.multi 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.
Fetches up to 10 swap or bridge quotes in a single batched call, executing all route lookups in parallel and returning each result alongside a total cost summary. Use this when splitting funds across multiple chains, executing multi-leg portfolio rebalancing, or comparing routes side-by-side without making sequential calls. Each element in the requests array accepts the same parameters as swap.quote (fromToken, toToken, fromAmount, fromAddress, fromChain, toChain, slippage, order). Returns per-request results with status ok or error (failed quotes do not abort the batch), plus aggregate gas and fee totals. Quotes are valid for approximately 30 seconds; sign and submit transactions sequentially to avoid nonce conflicts. Maximum 10 requests per call.. 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 swap.multi: 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.
swap.multi 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 swap.multi 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 swap.multi. 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.
swap.multi 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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