roam_search_hierarchy

Search for parent or child blocks in the block hierarchy. Can search up or down the hierarchy from a given block.

SERVERRoam Research SOURCE2b3pro/roam-research-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/2b3pro-roam-research-mcp/roam-search-hierarchy.md

WHAT IT DOES

What roam_search_hierarchy does on Roam Research

AI agents call roam_search_hierarchy to retrieve information from Roam Research without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why roam_search_hierarchy is rated Low

This tool queries the block hierarchy to find related blocks (parents/children) but does not create, modify, delete, or execute any operations. It is a pure read operation that retrieves hierarchical relationship information from the Roam Research graph. The low severity reflects minimal risk from misuse, as search operations have no side effects on the underlying data.

From the tool's definition Tool description states it 'Search[es] for parent or child blocks in the block hierarchy' - a retrieval operation with no modification or deletion of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs roam_search_hierarchy safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Roam Research, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For roam_search_hierarchy, this is the rule to start with:

roam_search_hierarchy Allowed

roam_search_hierarchy is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "roam_search_hierarchy": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Roam Research, apply this rule, and every roam_search_hierarchy call is checked against it from then on.

FAQ

Questions about roam_search_hierarchy

What does the roam_search_hierarchy tool do? +

Search for parent or child blocks in the block hierarchy. Can search up or down the hierarchy from a given block. It is categorised as a Read tool in the Roam Research MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on roam_search_hierarchy? +

Register the Roam Research MCP server in PolicyLayer and add a rule for roam_search_hierarchy: 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 Roam Research. Nothing to install.

What risk level is roam_search_hierarchy? +

roam_search_hierarchy is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit roam_search_hierarchy? +

Yes. Add a rate_limit block to the roam_search_hierarchy 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.

How do I block roam_search_hierarchy completely? +

Set action: deny in the PolicyLayer policy for roam_search_hierarchy. 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.

What MCP server provides roam_search_hierarchy? +

roam_search_hierarchy is provided by the Roam Research MCP server (2b3pro/roam-research-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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