AI agents call describe-index to retrieve information from Pinecone Developer MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries information about index configuration—a read-only operation with no side effects. It returns metadata and does not create, modify, delete, or execute operations. The severity is low as exposure would allow an attacker to inspect index structure but not compromise data integrity.
From the tool's definition Tool name 'describe-index' and description 'Describes the configuration of an index' indicate retrieval of metadata about an existing index without modification or deletion.
Documented attack patterns abuse exactly the kind of access describe-index gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pinecone Developer MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for describe-index:
{
"version": "1",
"default": "deny",
"tools": {
"describe-index": {}
}
}describe-index is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Describes the configuration of an index. It is categorised as a Read tool in the Pinecone Developer MCP MCP Server, which means it retrieves data without modifying state.
Register the Pinecone Developer MCP server in PolicyLayer and add a rule for describe-index: 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 Pinecone Developer MCP. Nothing to install.
describe-index 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 describe-index 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 describe-index. 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.
describe-index is provided by the Pinecone Developer MCP server (pinecone-io/pinecone-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 9 Pinecone Developer MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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9 Pinecone Developer MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.