create_chat_subscription_invite_link

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

The description adds a key behavioral constraint: the link is for a channel chat. Annotations (readOnlyHint=false, destructiveHint=false) already convey the write, non-destructive nature. However, it does not disclose permission requirements, the fact that the link is associated with a subscription, or side effects beyond creation, leaving some transparency gaps.

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

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

The description is a single sentence, 8 words, with a clear verb-first structure. It is perfectly concise and front-loaded with no redundant information.

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

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

There is no output schema, so the description should explain return values or additional context, but it does not. It also fails to mention required permissions, the meaning of subscription parameters, or how this interacts with sibling tools, making it incomplete for a 4-parameter mutation tool.

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

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

Schema description coverage is only 25% (only chat_id is described). The description does not explain subscription_price or subscription_period (e.g., currency, units, allowed values). It adds no meaningful parameter semantics beyond the parameter names, failing to compensate for the low schema coverage.

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

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

The description uses a specific verb 'Create' and identifies the resource 'subscription invite link' for 'a channel chat'. This clearly distinguishes it from sibling tools like create_chat_invite_link (regular invite link) and edit_chat_subscription_invite_link (editing an existing link).

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

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

The description implies usage for creating paid subscription links in channels but lacks explicit guidance on when to use this tool versus create_chat_invite_link or any prerequisites such as admin rights. There is no mention of alternatives or exclusions, so it provides only implied context.

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