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telegram-bot-mcp

telegram-bot-mcp

by Eweol
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python

send_photo

Send a photo to any Telegram chat by providing the target chat ID or @username along with a photo URL or Telegram file_id, with optional caption and formatting support.

Instructions

Send a photo to a Telegram chat.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "chat_id": "<chat_id>",
      "photo": "<photo>"
    },
    "name": "send_photo"
  }
}

Input Schema

NameRequiredDescriptionDefault
photoYesHTTP(S) URL of the photo or a Telegram file_id.
captionNoOptional caption (up to 1024 characters).
chat_idYesTarget chat id or @username.
parse_modeNoFormatting for the caption ("HTML", "Markdown", etc.).

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. The description doesn't mention that photos sent as URL must be publicly accessible, that sending by file_id requires the file to originate from the same bot, or any size/format restrictions. It doesn't describe what the response returns or whether this mutation is reversible. For a write operation with zero annotation support, this is a significant gap.

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 sentence with zero wasted words. Every element earns its place. It's appropriately terse and front-loaded with the core action first.

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

Completeness2/5

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

Despite a 100% schema coverage and output schema presence, the tool has no annotations and its description is minimal. Sending media via Telegram involves nuances the agent should know (URL accessibility requirements, file_id constraints, size limits, whether photo upload or send-by-reference) that are entirely absent. For a message-sending tool with behavioral subtleties, this is incomplete.

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 description coverage is 100%, so the schema documents all 4 parameters thoroughly (chat_id targets, photo as URL or file_id, caption limits, parse_mode formatting). The description itself adds no parameter explanations beyond the schema. Baseline 3 is appropriate since the schema handles documentation fully.

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

Purpose4/5

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

The description "Send a photo to a Telegram chat" uses a specific verb (send) with a specific resource (photo) and destination (Telegram chat). It clearly distinguishes from siblings like send_message, send_document, send_location, and send_poll. However, it's slightly terse and doesn't elaborate on the type of photo input accepted, though purpose is clear.

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

Usage Guidelines2/5

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

No guidance on when to use this tool vs. alternatives like send_document for images, or send_message. The description doesn't state when to prefer a URL vs. file_id, or clarify distinctions between photo and document sending. There's an implied context (sending photos to chats) but no explicit when-to-use or when-not-to-use guidance.

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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