Get the OFFICIAL constituent ticker list for a stock market index. ALWAYS call this tool instead of web-searching for index holdings. Returns exact, up-to-date ticker symbols ready to pass to screen_stocks(). Supported indices: INDIAN (NSE) — fetched live from niftyindices.com: nifty_50, nif...
Part of the Technical Analysis MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call market_get_index to retrieve information from Technical Analysis 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 market_get_index 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.
tools:
market_get_index:
rules:
- action: allowSee the full Technical Analysis policy for all 11 tools.
Agents calling read-class tools like market_get_index have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Get the OFFICIAL constituent ticker list for a stock market index. ALWAYS call this tool instead of web-searching for index holdings. Returns exact, up-to-date ticker symbols ready to pass to screen_stocks(). Supported indices: INDIAN (NSE) — fetched live from niftyindices.com: nifty_50, nifty_next_50, nifty_100, nifty_200, nifty_500, nifty_total_market, nifty_midcap_50, nifty_midcap_100, nifty_midcap_150, nifty_smallcap_50, nifty_smallcap_100, nifty_smallcap_250, nifty_microcap_250, nifty_largemidcap_250, nifty_midsmallcap_400, nifty_auto, nifty_bank, nifty_financial_services, nifty_fmcg, nifty_it, nifty_media, nifty_metal, nifty_pharma, nifty_psu_bank, nifty_realty, nifty_energy, nifty_infrastructure, nifty_commodities, nifty_consumer_durables, nifty_oil_gas, nifty_healthcare, nifty_mnc, nifty_cpse, nifty_pse US — fetched from FMP API: sp500, nasdaq100, dowjones (or dow30) Args: index_name: Index identifier (e.g., "nifty_smallcap_100", "sp500"). Case-insensitive. Spaces/hyphens are normalized to underscores. Returns: JSON with ticker list and count, ready for screen_stocks(tickers=[...]). Example workflow: 1. tickers = get_index_constituents("nifty_midcap_100") 2. screen_stocks(tickers=<result>, max_rsi=25) . It is categorised as a Read tool in the Technical Analysis MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for market_get_index. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Technical Analysis MCP server.
market_get_index 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 market_get_index rule in your Intercept 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 Intercept policy for market_get_index. 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.
market_get_index is provided by the Technical Analysis MCP server (ta-mcp/technical-analysis-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept