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Suppress an email or domain

add_suppression
Idempotent

Add an address (or whole domain) to the user's suppression list. Future confirmations and broadcasts will skip it across every test. Use kind='email' for a single address, kind='domain' for everyone @example.com.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
kindYes'email' for one address, 'domain' for everyone @example.com
notesNooptional reason / note for the suppression
valueYese.g. 'spammy@example.com' or 'competitor.com'

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedInput schema / properties / kind / description
      Added value: +"'email' for one address, 'domain' for everyone @example.com"
    • addedInput schema / properties / notes / description
      Added value: +"optional reason / note for the suppression"
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": false,
      +  "properties": {
      +    "result": {}
      +  },
      +  "required": [
      +    "result"
      +  ],
      +  "type": "object"
      +}
  2. First observed

TDQS

A4.2/5.0
Behavior4/5

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

Annotations indicate idempotentHint=true, and the description adds behavioral context by stating that suppressed addresses are skipped across every test for future confirmations and broadcasts. This goes beyond the annotation without contradicting it.

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?

Two sentences convey the purpose, effect, and parameter usage with no wasted words. The description is front-loaded with the action and immediately informative.

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

Completeness4/5

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

Given the presence of an output schema (not shown) and good annotations, the description covers the tool's effect adequately. It mentions cross-test impact, but could briefly mention return value format; still, it is largely complete.

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 coverage is 100%, so the baseline is 3. The description reinforces the schema examples but does not add new parameter details beyond what is already in the schema.

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

Purpose5/5

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

The description explicitly states the tool adds an address or domain to the suppression list, with clear distinction from sibling tools like remove_suppression. The effect on future confirmations and broadcasts is specified, making the purpose unmistakable.

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

Usage Guidelines4/5

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

The description provides explicit guidance on when to use kind='email' vs kind='domain', covering the two main use cases. It does not explicitly state when not to use the tool, but the context is sufficient for an AI agent to decide appropriately.

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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