VALIDATE — Schema validation for subagent responses from scatter-gather
AI agents call validate_subagent to retrieve information from Iconsult MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Schema validation is a read-only inspection operation. It examines incoming subagent responses to ensure they conform to expected structure, but does not create, modify, delete, or execute code. The tool performs passive verification with no side effects on the validated data or external systems. This is consistent with Read category tools that retrieve and verify information without state changes.
From the tool's definition Tool name 'validate_subagent' and description 'Schema validation for subagent responses from scatter-gather' indicate a validation/verification function that checks responses against a schema without modifying data or executing external operations.
Documented attack patterns abuse exactly the kind of access validate_subagent gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Iconsult MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for validate_subagent:
{
"version": "1",
"default": "deny",
"tools": {
"validate_subagent": {}
}
}validate_subagent is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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VALIDATE — Schema validation for subagent responses from scatter-gather. It is categorised as a Read tool in the Iconsult MCP MCP Server, which means it retrieves data without modifying state.
Register the Iconsult MCP server in PolicyLayer and add a rule for validate_subagent: 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 Iconsult MCP. Nothing to install.
validate_subagent 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 validate_subagent 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 validate_subagent. 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.
validate_subagent is provided by the Iconsult MCP server (marcus-waldman/iconsult_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Iconsult MCP, 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.
29 Iconsult MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.