Smart lead generation: find the best construction companies matching your criteria. Perfect for finding contractors, generating leads, or market research. Args: region: Filter by region name (e.g. 'Москва'). Empty = all. category: Filter by category/subcategory. Empty = all. min_rating: Minimum r...
Part of the MCP Market Russia server.
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AI agents call find_best_companies to retrieve information from MCP Market Russia without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though find_best_companies only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"find_best_companies": {}
}
}See the full MCP Market Russia policy for all 21 tools.
These attack patterns abuse exactly the kind of access find_best_companies gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Smart lead generation: find the best construction companies matching your criteria. Perfect for finding contractors, generating leads, or market research. Args: region: Filter by region name (e.g. 'Москва'). Empty = all. category: Filter by category/subcategory. Empty = all. min_rating: Minimum rating (0-5). 0 = no filter. max_price: Maximum price per m2 in thousands RUB. 0 = no filter. min_price: Minimum price per m2 in thousands RUB. 0 = no filter. has_phone: Only companies with phone number. has_projects: Only companies with project portfolio. sort_by: Sort by: 'rating', 'price_asc', 'price_desc', 'reviews', 'projects'. limit: Max results (1-50).. It is categorised as a Read tool in the MCP Market Russia MCP Server, which means it retrieves data without modifying state.
Register the MCP Market Russia MCP server in PolicyLayer and add a rule for find_best_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 MCP Market Russia. Nothing to install.
find_best_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 find_best_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 find_best_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.
find_best_companies is provided by the MCP Market Russia MCP server (devids77/mcp-market-russia). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 MCP Market Russia tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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