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

With no annotations, the description carries the full burden. It usefully discloses that this is a real (irreversible) send and reveals the x402 payment cost of 0.01 USDC on Base per use — valuable behavioral context. However it omits auth requirements, failure/retry behavior, and rate limits for what is a mutating external action.

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 clauses, front-loaded with what it does, then the input format, then cost. No filler. Slightly telegraphic — the delimiter format is terse but functional.

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 single-param send tool with no output schema, the description covers purpose, format, and cost, which is close to adequate. It does not mention authentication, whether the message is delivered to a bot-known chat, or error handling — gaps that matter for an external side-effecting call.

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 schema's own description is a generic 'service input', providing no real guidance. The description compensates by specifying the exact delimiter syntax input='<chat_id>||<mensaje>', which is essential to call the tool and is not in the schema.

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+resource — sends a real Telegram message — and the word 'real' clarifies that a side-effecting send occurs rather than a draft. No sibling tool covers Telegram messaging, so no exclusion is needed, but 'enviar-telegram' vs alternatives is unambiguous.

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 gives no when-to-use guidance, no prerequisites (bot token / chat ownership), and names no alternative. It only states the input format, leaving the agent to infer usage context entirely.

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