start_threads_connection

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

No annotations are provided, so the description carries the full burden. It does add real behavioral value — the directive to return the link only to the requesting person, a privacy/security constraint — but it says nothing about whether this starts or mutates connection state, link lifetime, or what happens if a connection already exists.

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?

Two short sentences with no filler, and the action is front-loaded before the delivery constraint. Slightly terse given the missing context, but nothing is wasted.

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?

For a zero-param, no-annotation, no-output-schema tool the description covers the essentials — what it does and what it returns (a link). It omits the surrounding flow (does it require check_threads_connection first, or feed confirm_threads_account?), which a nine-sibling publishing toolkit makes relevant.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline of 4 applies. The description correctly implies no inputs are needed beyond the request itself.

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?

States a specific verb and resource: obtain a Threads connection link on the person's request. It is distinguishable from check_threads_connection and confirm_threads_account by the word 'link', but it never names those siblings to make the boundary explicit.

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?

Usage is only implied by 'По просьбе человека' (on the person's request). There is no guidance on when to use this versus check_threads_connection, nor any mention of prerequisites such as an already-detected Threads origin, so the agent must infer the flow from sibling names.

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