Search for assets matching filter criteria. Use this when the user wants to find tickers by categorical state (e.g. 'which stocks are oversold?', 'find tech stocks in strong uptrend', 'find assets above the 50d'). Pass filters as a JSON-encoded array of {field, op, value} objects. Call get_schema...
Part of the TickerDB server.
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AI agents call get_search to retrieve information from TickerDB 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 get_search 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": {
"get_search": {}
}
}See the full TickerDB policy for all 11 tools.
These attack patterns abuse exactly the kind of access get_search 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.
Search for assets matching filter criteria. Use this when the user wants to find tickers by categorical state (e.g. 'which stocks are oversold?', 'find tech stocks in strong uptrend', 'find assets above the 50d'). Pass filters as a JSON-encoded array of {field, op, value} objects. Call get_schema first to discover valid field names - fields use full expanded names (e.g. 'momentum_rsi_zone' not 'rsi_zone', 'volatility_regime' not 'vol_regime', 'trend_distance_ma50' not 'ma_50'). Use 'fields' to control returned columns and 'sort_by' to rank results server-side.. It is categorised as a Read tool in the TickerDB MCP Server, which means it retrieves data without modifying state.
Register the TickerDB MCP server in PolicyLayer and add a rule for get_search: 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 TickerDB. Nothing to install.
get_search 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 get_search 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 get_search. 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.
get_search is provided by the TickerDB MCP server (tickerdb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 TickerDB tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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