Broadcast a pre-signed raw transaction. DRY_RUN default decodes without sending. Bypasses the per-wallet nonce manager and DRY_RUN simulation — caller is responsible for the bytes.
Part of the Kosyak Evm server.
Free to start. No card required.
AI agents use send_raw_transaction to create or modify resources in Kosyak Evm. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call send_raw_transaction repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Kosyak Evm.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"send_raw_transaction": {
"limits": [
{
"counter": "send_raw_transaction_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Kosyak Evm policy for all 50 tools.
These attack patterns abuse exactly the kind of access send_raw_transaction gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Broadcast a pre-signed raw transaction. DRY_RUN default decodes without sending. Bypasses the per-wallet nonce manager and DRY_RUN simulation — caller is responsible for the bytes.. It is categorised as a Write tool in the Kosyak Evm MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kosyak Evm MCP server in PolicyLayer and add a rule for send_raw_transaction: 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 Kosyak Evm. Nothing to install.
send_raw_transaction is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the send_raw_transaction 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 send_raw_transaction. 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.
send_raw_transaction is provided by the Kosyak Evm MCP server (kosyak-evm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 50 Kosyak Evm tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.