AI agents call query_with_dict_fields to retrieve information from UOFastMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves structured data from a U2 database file by querying against dictionary field definitions. It has no side effects: it does not modify, delete, execute code, or trigger external operations. The 'query' operation is inherently a Read action. Severity is low because misuse would at worst expose unauthorized data to an AI agent, but cannot cause destruction, financial harm, or system compromise.
From the tool's definition Tool description states 'Query a file and return data for specific DICT fields' — a read-only retrieval operation with no data modification, deletion, or execution capability.
Attacks that exploit this kind of access
Query a file and return data for specific DICT fields. First use get_dict_items to discover available fields, then use this tool to query with selected fields. It is categorised as a Read tool in the UOFastMCP MCP Server, which means it retrieves data without modifying state.
Register the UOFast MCP server in PolicyLayer and add a rule for query_with_dict_fields: 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 UOFastMCP. Nothing to install.
query_with_dict_fields 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 query_with_dict_fields 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 query_with_dict_fields. 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.
query_with_dict_fields is provided by the UOFast MCP server (rokipark/uofastmcp). 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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