segment_by_column
Generic segmentation that works on any categorical column.
This record as markdown: /tools/aegntic-aegntic-mcp/segment-by-column.md
What segment_by_column does on Obsidian Elite RAG MCP Server
AI agents call segment_by_column to retrieve information from Obsidian Elite RAG MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why segment_by_column is rated Low
Segmentation by column is a query and analysis operation that retrieves or organizes data into logical groups for inspection. It does not create, modify, delete, or execute external operations. The tool operates on data that already exists within the vault/dataset and produces analytical views without side effects. This is a classic Read category operation.
From the tool's definition Tool name 'segment_by_column' and description 'Generic segmentation that works on any categorical column' indicate a data analysis operation that partitions or groups existing data by a category for analytical purposes, with no modification or deletion of…
Attacks that exploit this kind of access
The rule that runs segment_by_column safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Obsidian Elite RAG MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For segment_by_column, this is the rule to start with:
segment_by_column 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 Obsidian Elite RAG MCP Server, apply this rule, and every segment_by_column call is checked against it from then on.
Questions about segment_by_column
Generic segmentation that works on any categorical column. It is categorised as a Read tool in the Obsidian Elite RAG MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Obsidian Elite RAG MCP Server MCP server in PolicyLayer and add a rule for segment_by_column: 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 Obsidian Elite RAG MCP Server. Nothing to install.
segment_by_column 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 segment_by_column 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 segment_by_column. 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.
segment_by_column is provided by the Obsidian Elite RAG MCP Server MCP server (aegntic/aegntic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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