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thenavidm

Gumroad MCP Server

by thenavidm

Update product

update_product
Destructive

Edit an existing Gumroad product's name, price, tags, description, category, or refund policy; requires explicit confirmation per call.

Instructions

Update product. Reviewed native PUT /products/:id; scope: edit_products. Requires explicit per-call confirmation.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo(optional)
tagsNo(optional) array of tag strings; full replacement
priceNo(optional) in the smallest currency unit; not allowed for tiered memberships — use the variant endpoints to manage tier pricing
accountNoExact private profile label; never inherited credentials, ownership or scope proof.
confirmNoSet true only when the user asked for exactly this action.
categoryNo(optional) full category path from GET /v2/categories, e.g. "design/ui-and-web/figma"; cannot be sent with taxonomy_id
is_adultNo(optional, true or false)
product_idYesExact opaque provider ID, including native = padding.
descriptionNo(optional) HTML
taxonomy_idNo(optional) numeric category ID; alias for category, cannot be sent with category
refund_periodNo(optional, "inherit", "none", "7", "14", "30", or "183") sets a product-level refund policy; "inherit" switches the product back to the account default. Only available when the account-level refund policy is not in effect; otherwise use PUT /v2/refund_policy
custom_receiptNo(optional)
custom_summaryNo(optional)
custom_permalinkNo(optional)
quantity_enabledNo(optional, true or false)
refund_fine_printNo(optional) fine print for the product-level refund policy; requires refund_period unless the product already has one enabled, and cannot be combined with refund_period "inherit". Empty string clears it
customizable_priceNo(optional, true or false)
max_purchase_countNo(optional)
price_currency_typeNo(optional) ISO currency code
suggested_price_centsNo(optional)
display_product_reviewsNo(optional, true or false)
should_show_sales_countNo(optional, true or false)
has_same_rich_content_for_all_variantsNo(optional, true or false) switches between product-level and per-variant rich content

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed4 schema fields changedv3.0.0
    • changedInput schema / properties / confirm / description
      Previous value: -"Explicit approval of this exact native effect or private file output."New value: +"Set true only when the user asked for exactly this action."
    • removedInput schema / properties / max_purchase_count / maximum
      Removed value: -9007199254740991
    • removedInput schema / properties / price / maximum
      Removed value: -9007199254740991
    • removedInput schema / properties / suggested_price_cents / maximum
      Removed value: -9007199254740991
  2. First observedv2.0.0

TDQS

B3.3/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare destructiveHint=true, idempotentHint=false, and openWorldHint=true. The description adds genuinely new context beyond those flags: the required auth scope (edit_products) and the mandatory per-call confirmation, plus the PUT semantics implying replacement behavior. It stops short of stating what happens to omitted fields, which for a destructive PUT would be valuable.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three tight sentences, front-loaded, with no filler. Minor waste in the opening 'Update product' sentence that duplicates the title rather than stating anything new, but overall efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 23-parameter destructive mutation with no output schema, the description covers auth scope and confirmation but omits the practical consequence of a PUT-style update (whether unspecified fields are cleared or preserved) and any response behavior. Adequate but leaves meaningful gaps an agent would want before calling a destructive tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the schema already documents all 23 parameters richly, including mutual exclusions (category vs taxonomy_id), enum values, and edge cases like refund_period. The description adds no parameter-level meaning, so the baseline of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose3/5

Does the description clearly state what the tool does and how it differs from similar tools?

The first sentence 'Update product' essentially restates the name and title, adding little on its own. The follow-up 'Reviewed native PUT /products/:id; scope: edit_products' does clarify that this is a product-level update tied to a specific endpoint and scope, but it never distinguishes this tool from sibling mutators like update_variant, update_offer_code, or create_product.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Requires explicit per-call confirmation' gives one concrete usage prerequisite. However, there is no guidance on when to prefer this over create_product, update_variant, or the variant endpoints (which the schema itself references for tiered pricing), so the agent must infer routing from siblings.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.