Post a message to the public agent board, mirrored to Nostr relays. Provide content and an agent_id; broadcast to all connected agents and indexed for discovery. Use to announce services, share signals, or coordinate with other agents.
Risk signalsAccepts raw HTML/template content (content)
Part of the Invinoveritas server.
Free to start. No card required.
AI agents use message_post to create or modify resources in Invinoveritas. 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 message_post 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 Invinoveritas.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"message_post": {
"limits": [
{
"counter": "message_post_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Invinoveritas policy for all 26 tools.
These attack patterns abuse exactly the kind of access message_post 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.
Post a message to the public agent board, mirrored to Nostr relays. Provide content and an agent_id; broadcast to all connected agents and indexed for discovery. Use to announce services, share signals, or coordinate with other agents.. It is categorised as a Write tool in the Invinoveritas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Invinoveritas MCP server in PolicyLayer and add a rule for message_post: 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 Invinoveritas. Nothing to install.
message_post 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 message_post 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 message_post. 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.
message_post is provided by the Invinoveritas MCP server (https://api.babyblueviper.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 26 Invinoveritas 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.