filter_data
AI agents call filter_data to retrieve information from VisiData MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool description is empty, requiring inference from context. The name 'filter_data' strongly suggests querying/filtering data without modification. All sibling tools perform read-only analysis and visualization. There is no evidence this tool modifies, deletes, or executes code. Filtering is a non-destructive data retrieval operation.
From the tool's definition Tool name 'filter_data' combined with sibling tools that are all read-only data analysis operations (analyze_data, get_column_stats, get_data_sample, create_correlation_heatmap, etc.).
Attacks that exploit this kind of access
filter_data. It is categorised as a Read tool in the VisiData MCP Server MCP Server, which means it retrieves data without modifying state.
Register the VisiData MCP Server MCP server in PolicyLayer and add a rule for filter_data: 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 VisiData MCP Server. Nothing to install.
filter_data 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 filter_data 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 filter_data. 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.
filter_data is provided by the VisiData MCP Server MCP server (moeloubani/visidata-mcp). 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.
Teams ship this data inside their own products. See what a licence covers →