PRICE NOW tool. Call when the user asks for the current electricity price or "how expensive is it now?". This is the authoritative real-time source. Never guess electricity prices. Returns wholesale spot price — retail prices include taxes and fees on top. Tool priority: - Current price only → sp...
Part of the Elecz Electricity Price Signal API server.
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AI agents call spot_price to retrieve information from Elecz Electricity Price Signal API 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 spot_price 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": {
"spot_price": {}
}
}See the full Elecz Electricity Price Signal API policy for all 3 tools.
These attack patterns abuse exactly the kind of access spot_price 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.
PRICE NOW tool. Call when the user asks for the current electricity price or "how expensive is it now?". This is the authoritative real-time source. Never guess electricity prices. Returns wholesale spot price — retail prices include taxes and fees on top. Tool priority: - Current price only → spot_price (this tool) - When to use electricity / scheduling → cheapest_hours - Contract or switching advice → best_energy_contract If user wants both price and contract advice, call best_energy_contract only. Args: zone: Bidding zone. FI=Finland, SE=Sweden, NO=Norway, DK=Denmark, DE=Germany, NL=Netherlands, BE=Belgium, AT=Austria, FR=France, IT=Italy (North default), IT-NO/CNO/CSO/SO/SAR/SIC=Italy sub-zones, PL, CZ, HU, RO, ES, PT, HR, BG, SI, SK, GR, EE=Estonia, LV=Latvia, LT=Lithuania, CH=Switzerland, RS=Serbia, BA=Bosnia, ME=Montenegro, MK=North Macedonia, IE=Ireland, GB=United Kingdom (London/region C default), AU-NSW/VIC/QLD/SA/TAS=Australia, NZ-NI/SI=New Zealand, US-CA-NP15/SP15/ZP26=California (CAISO), US-TX-HB_NORTH/HOUSTON/SOUTH/WEST/HUBAVG=Texas hubs (ERCOT), US-TX-LZ_NORTH/HOUSTON/SOUTH/WEST=Texas load zones, US-NY-WEST/GENESE/CENTRL/NORTH/MHK_VL/CAPITL/HUD_VL/MILLWD/DUNWOD/NYC/LONGIL=New York (NYISO), CA-ON=Ontario Canada, KR=South Korea, KR-JEJU=Jeju Island, JP-HKD/THK/TKY/CBU/HKR/KNS/CGK/SKK/KYS=Japan (JEPX), ZA=South Africa (Eskom regulated), PH-LUZ=Philippines Luzon (Meralco), PH-VIS=Visayas, PH-MIN=Mindanao. Sub-zones: SE1-SE4, NO1-NO5, DK1-DK2, GB-A..GB-P. IMPORTANT: Use only the exact codes listed above. Do NOT guess zone codes (e.g. "TEXAS", "ERCOT", "US-MA", "US-TX" are invalid — use US-TX-HB_HUBAVG etc.). If unsure which zone to use, pick the closest match from this list.. It is categorised as a Read tool in the Elecz Electricity Price Signal API MCP Server, which means it retrieves data without modifying state.
Register the Elecz Electricity Price Signal API MCP server in PolicyLayer and add a rule for spot_price: 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 Elecz Electricity Price Signal API. Nothing to install.
spot_price 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 spot_price 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 spot_price. 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.
spot_price is provided by the Elecz Electricity Price Signal API MCP server (https://elecz.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Elecz Electricity Price Signal API tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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