Index all files in a folder and automatically start watching it for changes. Files will be indexed into Neo4j and the folder will be monitored for future changes. REQUIRES: Path must exist on filesystem.
AI agents use index_folder to create or update resources in M I M I R Multi Agent Intelligent Memory & Insight Repository — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your M I M I R Multi Agent Intelligent Memory & Insight Repository environment.
This tool reads files from the filesystem and writes their contents/metadata into Neo4j as indexed nodes, and also sets up a persistent file watcher. It creates new data in the database (Write category).
From the tool's definition Index all files in a folder and automatically start watching it for changes. Files will be indexed into Neo4j and the folder will be monitored for future changes.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access index_folder gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and M I M I R Multi Agent Intelligent Memory & Insight Repository, and nothing reaches the server without passing your rules. This is the rule we recommend for index_folder:
{
"version": "1",
"default": "deny",
"tools": {
"index_folder": {
"limits": [
{
"counter": "index_folder_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}index_folder stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Index all files in a folder and automatically start watching it for changes. Files will be indexed into Neo4j and the folder will be monitored for future changes. REQUIRES: Path must exist on filesystem. It is categorised as a Write tool in the M I M I R Multi Agent Intelligent Memory & Insight Repository MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the M I M I R Multi Agent Intelligent Memory & Insight Repository MCP server in PolicyLayer and add a rule for index_folder: 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 M I M I R Multi Agent Intelligent Memory & Insight Repository. Nothing to install.
index_folder is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the index_folder 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 index_folder. 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.
index_folder is provided by the M I M I R Multi Agent Intelligent Memory & Insight Repository MCP server (orneryd/mimir). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 M I M I R Multi Agent Intelligent Memory & Insight Repository tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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13 M I M I R Multi Agent Intelligent Memory & Insight Repository tools catalogued and risk-classified — across an index of 42,500+ MCP servers.