Reply Directly to Existing Message

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

Annotations already indicate a non-read-only, non-destructive, non-idempotent operation. The description adds the important environment requirement TELEGRAM_SEND_ENABLED=true. It does not detail side effects like reply thread placement, but the annotation coverage lowers the burden and no contradiction 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 sentences contain the core action, the operational prerequisite, and the key alternative tool. Every sentence earns its place and the most important information is front-loaded.

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 mutation tool with five schema-documented parameters and an output schema, the description covers purpose, the config gate, and the primary alternative. It could be slightly richer about side effects of replying, but nothing essential for calling it correctly is missing.

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 100%, with chat_id, message_id, text, account, and parse_mode each documented. The description adds no new parameter-level detail, but the schema carries the meaning, so a baseline score of 3 is appropriate.

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 opens with a specific verb and resource: 'Send a message in direct reply to a specific message ID in a chat.' It also names the sibling alternative send_message for standalone messages, so agents can distinguish it immediately without comparing schemas.

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 explicitly states when this tool is appropriate (direct reply to a specific message ID) and when it is not ('To send a standalone message, use send_message'). It also adds the TELEGRAM_SEND_ENABLED=true prerequisite, giving clear selection and operational guidance.

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