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thread_link

Deprecated, works until 2026-11-10: use node_link.

Input Schema

NameRequiredDescriptionDefault
toYes
keyNo
whyNo
fromYes
kindNo
removeNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • removedInput schema / properties / key / description
      Removed value: -"agent key, when not signed in to an account"
    • addedInput schema / properties / kind
      Added value: +{
      +  "enum": [
      +    "relates",
      +    "blocks",
      +    "duplicates",
      +    "fixed-by",
      +    "part-of",
      +    "answers",
      +    "supersedes"
      +  ],
      +  "type": "string"
      +}
    • removedInput schema / properties / why / description
      Removed value: -"one line, at most 200 characters"
  2. Changed3 schema fields changed
    • addedInput schema / properties / key / description
      Added value: +"agent key, when not signed in to an account"
    • removedInput schema / properties / kind
      Removed value: -{
      -  "enum": [
      -    "relates",
      -    "blocks",
      -    "duplicates",
      -    "fixed-by",
      -    "part-of",
      -    "answers",
      -    "supersedes"
      -  ],
      -  "type": "string"
      -}
    • addedInput schema / properties / why / description
      Added value: +"one line, at most 200 characters"
  3. Changed3 schema fields changed
    • removedInput schema / properties / key / description
      Removed value: -"agent key, when not signed in to an account"
    • addedInput schema / properties / kind
      Added value: +{
      +  "enum": [
      +    "relates",
      +    "blocks",
      +    "duplicates",
      +    "fixed-by",
      +    "part-of",
      +    "answers",
      +    "supersedes"
      +  ],
      +  "type": "string"
      +}
    • removedInput schema / properties / why / description
      Removed value: -"one line, at most 200 characters"
  4. Changed3 schema fields changed
    • addedInput schema / properties / key / description
      Added value: +"agent key, when not signed in to an account"
    • removedInput schema / properties / kind
      Removed value: -{
      -  "enum": [
      -    "relates",
      -    "blocks",
      -    "duplicates",
      -    "fixed-by",
      -    "part-of",
      -    "answers",
      -    "supersedes"
      -  ],
      -  "type": "string"
      -}
    • addedInput schema / properties / why / description
      Added value: +"one line, at most 200 characters"
  5. Changed1 schema field changed
    • addedInput schema / properties / kind
      Added value: +{
      +  "enum": [
      +    "relates",
      +    "blocks",
      +    "duplicates",
      +    "fixed-by",
      +    "part-of",
      +    "answers",
      +    "supersedes"
      +  ],
      +  "type": "string"
      +}
  6. Changed2 schema fields changed
    • removedInput schema / properties / key / description
      Removed value: -"agent key, when not signed in to an account"
    • removedInput schema / properties / why / description
      Removed value: -"one line, at most 200 characters"
  7. Changed2 schema fields changed
    • addedInput schema / properties / key / description
      Added value: +"agent key, when not signed in to an account"
    • addedInput schema / properties / why / description
      Added value: +"one line, at most 200 characters"
  8. Changed2 schema fields changed
    • removedInput schema / properties / key / description
      Removed value: -"agent key, when not signed in to an account"
    • removedInput schema / properties / why / description
      Removed value: -"one line, at most 200 characters"
  9. Changed2 schema fields changed
    • addedInput schema / properties / key / description
      Added value: +"agent key, when not signed in to an account"
    • addedInput schema / properties / why / description
      Added value: +"one line, at most 200 characters"
  10. Changed5 schema fields changed
    • removedInput schema / properties / from / properties
      Removed value: -null
    • removedInput schema / properties / key / properties
      Removed value: -null
    • removedInput schema / properties / remove / properties
      Removed value: -null
    • removedInput schema / properties / to / properties
      Removed value: -null
    • removedInput schema / properties / why / properties
      Removed value: -null
  11. Changed7 schema fields changed
    • addedInput schema / properties / from / properties
      Added value: +null
    • removedInput schema / properties / key / description
      Removed value: -"agent key, when not signed in to an account"
    • addedInput schema / properties / key / properties
      Added value: +null
    • addedInput schema / properties / remove / properties
      Added value: +null
    • addedInput schema / properties / to / properties
      Added value: +null
    • removedInput schema / properties / why / description
      Removed value: -"one line, at most 200 characters"
    • addedInput schema / properties / why / properties
      Added value: +null
  12. Added

TDQS

C2.6/5.0
Behavior2/5

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

Annotations already declare mutation, open-world, non-idempotent, non-destructive behavior, so the description only adds the deprecation timeline. It discloses nothing about what a link creation actually does, what 'remove' does, or whether the operation is reversible.

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 waste, and the deprecation notice plus deadline are front-loaded.

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?

For a legacy mutation tool with six undocumented parameters and no output schema, the description only covers migration routing. An agent could avoid the tool but could not call it correctly if it needed to before the cutoff.

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

Parameters1/5

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

Six parameters with 0% schema description coverage and the description supplies no parameter meaning at all. Non-obvious semantics like the 'kind' enum values and the 'remove' boolean are left entirely unexplained.

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

Purpose2/5

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

The description never states what the tool does. It only says it is deprecated and points at node_link, so an agent must infer the purpose (linking threads/nodes) from the name and the replacement tool.

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?

It names the exact alternative (node_link) and a concrete cutoff date (2026-11-10). This is a clear when-not-to-use instruction, though it does not say under what circumstances, if any, the legacy tool should still be called.

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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