AI agents invoke resend_message to trigger actions in Lenses MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
The name 'resend_message' suggests re-publishing or re-sending a message to a Kafka topic, which would be an external operation with side effects (triggering downstream consumers again). This falls under Execute as it triggers an external operation. However, with an empty description, confidence is low. It could also be Write.
From the tool's definition Tool name is 'resend_message'; description is empty or uninformative.
Documented attack patterns abuse exactly the kind of access resend_message gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Lenses MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for resend_message:
{
"version": "1",
"default": "deny",
"tools": {
"resend_message": {
"limits": [
{
"counter": "resend_message_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}resend_message stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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resend_message. It is categorised as a Execute tool in the Lenses MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Lenses MCP Server MCP server in PolicyLayer and add a rule for resend_message: 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 Lenses MCP Server. Nothing to install.
resend_message 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 resend_message 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 resend_message. 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.
resend_message is provided by the Lenses MCP Server MCP server (lensesio/lenses-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Lenses MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
42 Lenses MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.