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Bale MCP Server

bale_send_message

Send text messages to users, groups, or channels and optionally reply to a specific message.

Instructions

Send a text message to a user, group, or channel with optional reply support.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
textYes
chat_idYes
chat_typeNoprivate
reply_to_message_idNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.7/5.0
Behavior2/5

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

With no annotations, the description carries the full behavioral burden. It implies a write/mutation but discloses nothing about authentication requirements, whether chat_id must reference an existing dialog, rate limits, or error behavior. The only behavioral signal is 'optional reply support', which is thin for a message-sending tool.

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

Conciseness4/5

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

A single well-formed sentence with the action front-loaded and no wasted words. It is efficient, though its brevity borders on under-specification rather than true conciseness.

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?

An output schema exists, so return values need not be described. However, for a 4-parameter mutation tool with zero annotation coverage and 0% schema description coverage, the description leaves too much undocumented, especially around chat_type semantics and parameter usage.

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

Parameters2/5

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

Schema description coverage is 0%, so the description must compensate for all four parameters. It hints at the message body and 'reply support' (mapping loosely to reply_to_message_id), but says nothing about chat_id format, the chat_type default of 'private', or valid chat_type values.

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?

States a specific verb+resource ('Send a text message') plus the recipient scope (user, group, channel) and reply capability. This clearly separates it from bale_edit_message, bale_forward_message, and bale_delete_message, though it never names a sibling explicitly.

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 indication of when to use this versus alternatives like bale_forward_message or bale_edit_message, and no prerequisites or preconditions. Usage is only implied by the verb.

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