cancelSubscription
Destructive
Stop future charges for one subscription (paid time runs out).
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| subscription_id | Yes | The subscription. |
TgPay Merchant API
by com.tgpaybot
Schema Changelog
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
- First observed
TDQS
A4.1/5.0
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark this as destructive, and the description adds a useful behavioral nuance: paid time continues until it runs out. This goes beyond the annotation by explaining the post-cancellation outcome.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
A single, front-loaded sentence conveys the action and its consequence. Every word earns its place, and the parenthetical adds necessary context without bloat.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness5/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a single-parameter destructive action with no output schema and annotations covering the destructive hint, the description is complete. An agent knows what the tool does, what to pass, and what will happen after calling it.
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 coverage is 100% and the sole parameter subscription_id is described as 'The subscription.' The description adds no extra meaning beyond the schema, so the baseline of 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
Description uses a specific verb ('Stop future charges') and resource ('one subscription'), distinguishing cancellation from siblings like archiveSubscriptionPlan or getSubscriptions. The parenthetical clarifies the practical effect without ambiguity.
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?
The description implies the use case: cancel a subscription to prevent future charges. However, it does not explicitly state when to choose this over alternatives, nor does it mention exclusions or conditions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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TDQS
A3.5/5.0
Disambiguation5/5
Each tool maps to a distinct resource or action: invoices, subscription plans, subscriptions, checks, transfers, balance, rates, and auth flows. The two-step connect/connect_status pair is clearly separated into initiate and poll, and similar actions like archiveSubscriptionPlan versus cancelSubscription are explicitly differentiated.
Naming Consistency4/5
The vast majority of tools follow a camelCase verb_noun pattern such as createInvoice, getSubscriptions, and refundInvoice. The exceptions are connect_status and get_docs, which use snake_case, creating a minor but noticeable inconsistency.
Tool Count4/5
At 21 tools, the server is on the heavier side but the breadth of a merchant payment API justifies it: auth, invoices, subscriptions, transfers/checks, balances, exchange rates, stats, webhooks, and docs all need coverage. No tools feel redundant, though a few list-only endpoints could arguably be consolidated.
Completeness3/5
Core invoice and subscription lifecycles are well covered: create, list, delete, archive, cancel, and refund. However, there is no visible createTransfer or createCheck tool even though the API includes transfers/checks docs and deleteCheck/getTransfers, leaving a notable dead end for initiating transfers.