Generate a Proof of Funds letter (PDF) for the authenticated user. Requires completed identity verification and at least one verified wallet. Returns a download link valid for 30 days. The response renders an inline widget with a thumbnail preview and download/share controls; you do not need to r...
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AI agents use generate_proof_of_funds to create or modify resources in Mcp Server. 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 generate_proof_of_funds 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 Mcp Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"generate_proof_of_funds": {
"limits": [
{
"counter": "generate_proof_of_funds_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Mcp Server policy for all 19 tools.
These attack patterns abuse exactly the kind of access generate_proof_of_funds 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.
Generate a Proof of Funds letter (PDF) for the authenticated user. Requires completed identity verification and at least one verified wallet. Returns a download link valid for 30 days. The response renders an inline widget with a thumbnail preview and download/share controls; you do not need to repeat the download URL in your text response — the widget handles presentation. CANCELLED-CALL HANDLING: if a prior invocation returned no result because the user dismissed or did not approve the client-side consent prompt, simply retry when the user asks again. Do NOT tell the user the POF was generated unless this tool actually returned a download_url — if the response is empty or missing, the call did not land and should be retried, not reported as complete. CEILING: the requested amount must be ≤ pof_ceiling_usd from get_wallet_summary; never use total_verified_usd or the sum of wallets[].total_usd as a ceiling — total_verified_usd is pre-haircut (before a volatility/pricing buffer) and the generator will reject amounts above the true ceiling. If unsure of the current ceiling, call get_wallet_summary first.. It is categorised as a Write tool in the Mcp Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Server MCP server in PolicyLayer and add a rule for generate_proof_of_funds: 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 Mcp Server. Nothing to install.
generate_proof_of_funds 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 generate_proof_of_funds 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 generate_proof_of_funds. 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.
generate_proof_of_funds is provided by the Mcp Server MCP server (https://mcp.realopen.app/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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