List all companies the user has access to. Use this when you need to select a different company or see available options.
AI agents call list_user_companies to retrieve information from StockSpark MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of accessible companies for the user. It performs no mutations, deletions, or external operations—purely a read operation to enumerate available options. The low severity reflects minimal blast radius even if called repeatedly or misused by an agent.
From the tool's definition Tool name 'list_user_companies' and description 'List all companies the user has access to' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all companies the user has access to. Use this when you need to select a different company or see available options. It is categorised as a Read tool in the StockSpark MCP Server MCP Server, which means it retrieves data without modifying state.
Register the StockSpark MCP Server MCP server in PolicyLayer and add a rule for list_user_companies: 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 StockSpark MCP Server. Nothing to install.
list_user_companies 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_user_companies 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_user_companies. 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_user_companies is provided by the StockSpark MCP Server MCP server (loukach/stockspark-mcp-poc). 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 →