Get Gembook's fair-value estimate (USD) for a PSA-graded vintage Pokémon card (WotC era, Base Set through Skyridge, 1999–2003). Returns fair value, range, confidence tier, comp count, and the card page URL. Call this when a user asks what a vintage Pokémon card is worth or whether a price is fair...
AI agents call lookup_card_price to retrieve information from Gembook — PSA Vintage Pokémon Prices & Pop without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
grade | integer | — | PSA grade 1–10 |
variant | string | — | Edition/variant to narrow, e.g. '1st Edition', 'Shadowless', 'Unlimited', 'Reverse Holo' |
set_name | string | — | Set name to narrow, e.g. 'Base', 'Jungle', 'Neo Genesis' |
card_name | string | Yes | Card name, e.g. 'Charizard' |
Parameters from the server's own tool schema.
This tool retrieves pricing and population data for vintage Pokémon cards without modifying, executing operations, or causing side effects. It is a straightforward query function that returns informational data to help users evaluate card values. No destructive, financial, or executable operations are possible.
From the tool's definition Tool description states 'Get Gembook's fair-value estimate' and 'Returns fair value, range, confidence tier, comp count, and the card page URL.' These are pure data retrieval operations. Server description explicitly labels this as 'Read-only.'
Attacks that exploit this kind of access
Get Gembook's fair-value estimate (USD) for a PSA-graded vintage Pokémon card (WotC era, Base Set through Skyridge, 1999–2003). Returns fair value, range, confidence tier, comp count, and the card page URL. Call this when a user asks what a vintage Pokémon card is worth or whether a price is fair. Scope is PSA-graded vintage Pokémon ONLY — other graders, eras, or TCGs are out of scope. It is categorised as a Read tool in the Gembook — PSA Vintage Pokémon Prices & Pop MCP Server, which means it retrieves data without modifying state.
lookup_card_price accepts 4 parameters: grade, variant, set_name, card_name. Required: card_name. The full parameter table on this page comes from the server's own tool schema.
Register the Gembook — PSA Vintage Pokémon Prices & Pop MCP server in PolicyLayer and add a rule for lookup_card_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 Gembook — PSA Vintage Pokémon Prices & Pop. Nothing to install.
lookup_card_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 lookup_card_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 lookup_card_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.
lookup_card_price is provided by the Gembook — PSA Vintage Pokémon Prices & Pop MCP server (https://gembook.xyz/api/mcp/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
lookup_card_price is one line of Gembook — PSA Vintage Pokémon Prices & Pop's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →