List all Meta Business Manager accounts reachable from the authenticated System User. Discovery walks /me/adaccounts and /me/accounts (Pages) and deduplicates the parent businesses — /me/businesses returns empty for System User tokens. Use the returned business IDs as input to list_product_catalo...
AI agents call list_businesses to retrieve information from Claude Meta without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs discovery and enumeration of existing Meta Business Manager accounts and their relationships. It has no side effects, creates no data, and cannot modify or delete resources. The blast radius of misuse is limited to exposure of which business accounts are accessible — a read operation. Confidence is high because the description is explicit and unambiguous.
From the tool's definition Tool description explicitly states 'Read-only' and 'List all Meta Business Manager accounts' — it retrieves/queries business data via /me/adaccounts, /me/accounts, and /me/businesses endpoints with no modification or deletion.
Attacks that exploit this kind of access
List all Meta Business Manager accounts reachable from the authenticated System User. Discovery walks /me/adaccounts and /me/accounts (Pages) and deduplicates the parent businesses — /me/businesses returns empty for System User tokens. Use the returned business IDs as input to list_product_catalogs. Read-only. It is categorised as a Read tool in the Claude Meta MCP Server, which means it retrieves data without modifying state.
Register the Claude Meta MCP server in PolicyLayer and add a rule for list_businesses: 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 Claude Meta. Nothing to install.
list_businesses 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 list_businesses 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 list_businesses. 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.
list_businesses is provided by the Claude Meta MCP server (maxx3250/claude-meta-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.
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