List approval requests that are blocked waiting for review. Use this before calling sint__approve or sint__deny so you can inspect request IDs, affected resources, actions, reasons, and expiration times. This tool does not mutate state and returns a JSON array of pending approval summaries.
AI agents call sint__pending to retrieve information from SINT Protocol without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
sint__pending retrieves and displays pending approval requests without modifying any state. It is informational—a read operation used to inspect request details before making approval decisions. No side effects, no data modification, no execution of downstream operations. This is a classic Read category tool.
From the tool's definition Tool description states 'List approval requests' and explicitly 'This tool does not mutate state and returns a JSON array of pending approval summaries.' The name 'sint__pending' and verb 'List' indicate retrieval/query operation only.
Documented attack patterns abuse exactly the kind of access sint__pending gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SINT Protocol, and nothing reaches the server without passing your rules. This is the rule we recommend for sint__pending:
{
"version": "1",
"default": "deny",
"tools": {
"sint__pending": {}
}
}sint__pending is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List approval requests that are blocked waiting for review. Use this before calling sint__approve or sint__deny so you can inspect request IDs, affected resources, actions, reasons, and expiration times. This tool does not mutate state and returns a JSON array of pending approval summaries. It is categorised as a Read tool in the SINT Protocol MCP Server, which means it retrieves data without modifying state.
Register the SINT Protocol MCP server in PolicyLayer and add a rule for sint__pending: 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 SINT Protocol. Nothing to install.
sint__pending 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 sint__pending 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 sint__pending. 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.
sint__pending is provided by the SINT Protocol MCP server (sint-ai/sint-protocol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SINT Protocol, 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.
21 SINT Protocol tools catalogued and risk-classified — across an index of 43,000+ MCP servers.