This query retrieves all entity types in the RDF graph, along with their labels and comments if available.
AI agents call podbc_sparql_list_entity_types to retrieve information from MCP PyODBC Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries metadata about RDF entity types in a graph database. It performs a read-only SPARQL query to enumerate schema information. There are no side effects, no data modification, no execution of arbitrary commands, and no destructive operations. The blast radius of misuse is minimal — an attacker gains knowledge of the database schema but cannot alter data or execute commands.
From the tool's definition Tool name contains 'list' and description states 'retrieves all entity types' with 'labels and comments' — purely informational/query operations with no modification, deletion, or execution of arbitrary code.
Attacks that exploit this kind of access
This query retrieves all entity types in the RDF graph, along with their labels and comments if available. It is categorised as a Read tool in the MCP PyODBC Server MCP Server, which means it retrieves data without modifying state.
Register the MCP PyODBC Server MCP server in PolicyLayer and add a rule for podbc_sparql_list_entity_types: 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 PyODBC Server. Nothing to install.
podbc_sparql_list_entity_types 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 podbc_sparql_list_entity_types 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 podbc_sparql_list_entity_types. 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.
podbc_sparql_list_entity_types is provided by the MCP PyODBC Server MCP server (openlinksoftware/mcp-pyodbc-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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