crow_data_schema
Get the schema (tables, columns, types, row counts, indexes) for a registered SQLite database.
This record as markdown: /tools/kh0pper-crow/crow-data-schema.md
What crow_data_schema does on Crow
AI agents call crow_data_schema to retrieve information from Crow without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why crow_data_schema is rated Low
This tool retrieves metadata about a SQLite database's structure without executing queries, modifying data, or triggering side effects. It is purely informational (Read category). Severity is low because schema disclosure alone poses minimal risk; an attacker would still need separate write/execute access to cause harm. The tool provides no capability to execute arbitrary SQL or access actual data contents.
From the tool's definition Tool description explicitly states it 'Get[s] the schema' and lists information retrieval operations: 'tables, columns, types, row counts, indexes'.
Attacks that exploit this kind of access
The rule that runs crow_data_schema safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Crow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For crow_data_schema, this is the rule to start with:
crow_data_schema is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Crow, apply this rule, and every crow_data_schema call is checked against it from then on.
Questions about crow_data_schema
Get the schema (tables, columns, types, row counts, indexes) for a registered SQLite database. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.
Register the Crow MCP server in PolicyLayer and add a rule for crow_data_schema: 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 Crow. Nothing to install.
crow_data_schema 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 crow_data_schema 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 crow_data_schema. 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.
crow_data_schema is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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