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Recall

crbro_recall
Read-onlyIdempotent

Search saved facts, decisions, patterns, preferences, errors, debts and maps from earlier sessions before answering questions about the user, projects or past work.

Instructions

Read-only search of everything saved in earlier sessions — facts, decisions, patterns, preferences, errors, debts and maps. Call it BEFORE answering anything about the user, their projects, preferences, decisions or past work: the answer is usually stored, and making them repeat it is the failure this memory exists to prevent. One result per neuron: the best matching entry with entry_id (read it whole: crbro_inspect view=neuron entries=[id]), matched_kind, matched_added, a confidence label (weak = little of the question covered; verify) and also_matched previews. Lines not the user's own carry origin, also_matched too: team: (team if unshared) with self-declared by, or miner. Rows past their shelf life move to possibly_stale as last_known with a next_step: check before answering with one, or say it may be out of date. If nothing matches, retry with 2-4 phrasings in queries or fewer, rarer words. has_map:true: read the system map with crbro_map before touching that system.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
kindNoOnly these entry kinds, e.g. ["error"] for past mistakes before repeating one, ["decision"] for what was agreed and why, ["debt"] for what was deferred. Day logs are left out when set.
limitNoMax neurons returned (default 5, ranked; ask for more only when the top five did not answer).
queryYesWhat to look for, e.g. "Firebase authentication setup". Fewer, distinctive terms beat full sentences.
sinceNoOnly entries recorded on or after this: a day ("2026-09-01") or a span back from today ("7d", "2w", "3m"). For "what changed lately" and to keep an old telling out. A later verification does not make an old entry new. Undated entries cannot prove they are recent: they are left out and counted in undated_skipped.
domainNoOnly neurons in this domain (exact match, e.g. "proyectos-web"). Day logs have no domain: sessions_matched is listed regardless.
queriesNoAlternative phrasings of the same question, searched together with query and fused by rank. Use synonyms, the other language and the concrete product name; 2-4 is plenty.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
hintYes
queryYes
filtersNo
resultsYes
has_moreNo
returnedNoRows that came back: results plus possibly_stale
truncatedNo
stale_warningNoSet, first, when some row moved to possibly_stale: do not answer with those as current
total_resultsYes
possibly_staleNoRows whose best entry is past its shelf life since last verified: warning, next_step (what to check before answering), the entry as last_known instead of matching_content, then the rest of a results row plus age_days, last_verified, shelf_life, shelf_inferred
sessions_totalNo
matched_neuronsNoNeurons with any hit before limit; total_results is what came back
undated_skippedNoWith since: matching entries left out for having no date
sessions_matchedNo
possibly_stale_countNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed11 schema fields changedv2.9.1
    • changedInput schema / properties / since / description
      Previous value: -"Only entries dated on or after this: a day (\"2026-09-01\") or a span back from today (\"7d\", \"2w\", \"3m\"). For \"what changed lately\" and to keep an old telling out. Undated entries cannot prove they are recent: they are left out and counted in undated_skipped."New value: +"Only entries recorded on or after this: a day (\"2026-09-01\") or a span back from today (\"7d\", \"2w\", \"3m\"). For \"what changed lately\" and to keep an old telling out. A later verification does not make an old entry new. Undated entries cannot prove they are recent: they are left out and counted in undated_skipped."
    • addedOutput schema / properties / possibly_stale
      Added value: +{
      +  "description": "Rows whose best entry is past its shelf life since last verified: warning, next_step (what to check before answering), the entry as last_known instead of matching_content, then the rest of a results row plus age_days, last_verified, shelf_life, shelf_inferred",
      +  "items": {
      +    "additionalProperties": {},
      +    "properties": {
      +      "age_days": {
      +        "type": "number"
      +      },
      +      "last_known": {
      +        "type": "string"
      +      },
      +      "last_verified": {
      +        "type": "string"
      +      },
      +      "neuron_id": {
      +        "type": "string"
      +      },
      +      "next_step": {
      +        "type": "string"
      +      },
      +      "shelf_inferred": {
      +        "type": "boolean"
      +      },
      +      "shelf_life": {
      +        "type": "string"
      +      },
      +      "warning": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "warning",
      +      "next_step",
      +      "last_known",
      +      "neuron_id",
      +      "age_days",
      +      "last_verified",
      +      "shelf_life",
      +      "shelf_inferred"
      +    ],
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / possibly_stale_count
      Added value: +{
      +  "type": "number"
      +}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / by
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / origin
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / stale_days
      Added value: +{
      +  "type": "number"
      +}
    • addedOutput schema / properties / results / items / properties / by
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / results / items / properties / origin
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / results / items / properties / rank
      Added value: +{
      +  "description": "Position in the ranking, set when some row moved to possibly_stale",
      +  "type": "number"
      +}
    • addedOutput schema / properties / returned / description
      Added value: +"Rows that came back: results plus possibly_stale"
    • addedOutput schema / properties / stale_warning
      Added value: +{
      +  "description": "Set, first, when some row moved to possibly_stale: do not answer with those as current",
      +  "type": "string"
      +}
  2. Changed4 schema fields changedv2.5.1
    • addedInput schema / properties / kind
      Added value: +{
      +  "description": "Only these entry kinds, e.g. [\"error\"] for past mistakes before repeating one, [\"decision\"] for what was agreed and why, [\"debt\"] for what was deferred. Day logs are left out when set.",
      +  "items": {
      +    "enum": [
      +      "fact",
      +      "decision",
      +      "pattern",
      +      "preference",
      +      "error",
      +      "debt",
      +      "map"
      +    ],
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • addedInput schema / properties / since
      Added value: +{
      +  "description": "Only entries dated on or after this: a day (\"2026-09-01\") or a span back from today (\"7d\", \"2w\", \"3m\"). For \"what changed lately\" and to keep an old telling out. Undated entries cannot prove they are recent: they are left out and counted in undated_skipped.",
      +  "type": "string"
      +}
    • addedOutput schema / properties / filters
      Added value: +{
      +  "additionalProperties": false,
      +  "properties": {
      +    "kind": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "since": {
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
    • addedOutput schema / properties / undated_skipped
      Added value: +{
      +  "description": "With since: matching entries left out for having no date",
      +  "type": "number"
      +}
  3. Changed2 schema fields changedv2.4.0
    • removedInput schema / $schema
      Removed value: -"http://json-schema.org/draft-07/schema#"
    • removedOutput schema / $schema
      Removed value: -"http://json-schema.org/draft-07/schema#"
  4. Changed3 schema fields changedv2.2.0
    • changedInput schema / properties / domain / description
      Previous value: -"Only neurons in this domain (exact match, e.g. \"proyectos-web\")."New value: +"Only neurons in this domain (exact match, e.g. \"proyectos-web\"). Day logs have no domain: sessions_matched is listed regardless."
    • addedOutput schema / properties / sessions_matched
      Added value: +{
      +  "items": {
      +    "additionalProperties": {},
      +    "properties": {},
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / sessions_total
      Added value: +{
      +  "type": "number"
      +}
  5. Changed17 schema fields changedv2.1.0
    • changedInput schema / properties / limit / description
      Previous value: -"Max neurons returned (default 10)."New value: +"Max neurons returned (default 5, ranked; ask for more only when the top five did not answer)."
    • addedInput schema / properties / limit / exclusiveMinimum
      Added value: +0
    • addedInput schema / properties / limit / maximum
      Added value: +9007199254740991
    • changedInput schema / properties / limit / type
      Previous value: -"number"New value: +"integer"
    • addedOutput schema / properties / has_more
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / matched_neurons
      Added value: +{
      +  "description": "Neurons with any hit before limit; total_results is what came back",
      +  "type": "number"
      +}
    • changedOutput schema / properties / results / items / properties / also_matched / items / additionalProperties
      Previous value: -falseNew value: +{}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / chars
      Added value: +{
      +  "type": "number"
      +}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / entry_id
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / results / items / properties / also_matched / items / properties / preview
      Added value: +{
      +  "type": "string"
      +}
    • removedOutput schema / properties / results / items / properties / also_matched / items / properties / text
      Removed value: -{
      -  "type": "string"
      -}
    • changedOutput schema / properties / results / items / properties / also_matched / items / required
      Previous value: -[
      -  "text",
      -  "kind",
      -  "added"
      -]New value: +[
      +  "kind",
      +  "added",
      +  "preview",
      +  "chars"
      +]
    • addedOutput schema / properties / results / items / properties / content_chars
      Added value: +{
      +  "type": "number"
      +}
    • addedOutput schema / properties / results / items / properties / content_truncated
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / results / items / properties / entry_id
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / returned
      Added value: +{
      +  "type": "number"
      +}
    • addedOutput schema / properties / truncated
      Added value: +{
      +  "additionalProperties": {},
      +  "properties": {},
      +  "type": "object"
      +}
  6. Changed1 schema field changed
    • addedInput schema / properties / queries
      Added value: +{
      +  "description": "Alternative phrasings of the same question, searched together with query and fused by rank. Use synonyms, the other language and the concrete product name; 2-4 is plenty.",
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
  7. Changed4 schema fields changedv1.14.0
    • changedInput schema / properties / domain / description
      Previous value: -"Filter by domain"New value: +"Only neurons in this domain (exact match, e.g. \"proyectos-web\")."
    • changedInput schema / properties / limit / description
      Previous value: -"Max results (default 10)"New value: +"Max neurons returned (default 10)."
    • changedInput schema / properties / query / description
      Previous value: -"What to search for (e.g., \"Firebase authentication setup\")"New value: +"What to look for, e.g. \"Firebase authentication setup\". Fewer, distinctive terms beat full sentences."
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": false,
      +  "properties": {
      +    "hint": {
      +      "type": "string"
      +    },
      +    "query": {
      +      "type": "string"
      +    },
      +    "results": {
      +      "items": {
      +        "additionalProperties": {},
      +        "properties": {
      +          "also_matched": {
      +            "items": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "added": {
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "type": "string"
      +                },
      +                "text": {
      +                  "type": "string"
      +                }
      +              },
      +              "required": [
      +                "text",
      +                "kind",
      +                "added"
      +              ],
      +              "type": "object"
      +            },
      +            "type": "array"
      +          },
      +          "confidence": {
      +            "enum": [
      +              "strong",
      +              "weak"
      +            ],
      +            "type": "string"
      +          },
      +          "domain": {
      +            "type": "string"
      +          },
      +          "has_map": {
      +            "type": "boolean"
      +          },
      +          "heat": {
      +            "type": "number"
      +          },
      +          "matched_added": {
      +            "type": "string"
      +          },
      +          "matched_kind": {
      +            "type": "string"
      +          },
      +          "matched_terms": {
      +            "type": "number"
      +          },
      +          "matching_content": {
      +            "type": "string"
      +          },
      +          "name": {
      +            "type": "string"
      +          },
      +          "neuron_id": {
      +            "type": "string"
      +          },
      +          "query_terms": {
      +            "type": "number"
      +          },
      +          "relevance_score": {
      +            "type": "number"
      +          }
      +        },
      +        "required": [
      +          "neuron_id",
      +          "name",
      +          "domain",
      +          "relevance_score",
      +          "matching_content",
      +          "heat"
      +        ],
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "total_results": {
      +      "type": "number"
      +    }
      +  },
      +  "required": [
      +    "query",
      +    "total_results",
      +    "results",
      +    "hint"
      +  ],
      +  "type": "object"
      +}
  8. First observedv1.4.0

TDQS

A4.4/5.0
Behavior4/5

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

Annotations cover the safety profile (readOnly, idempotent, non-destructive), and the description still adds substantial behavior: one result per neuron, confidence labels with 'weak = verify', origin/team attribution rules, and shelf-life handling via possibly_stale with a next_step. It does not describe pagination or result-count caps beyond limit, which keeps it short of a 5.

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?

Front-loaded with the core imperative and scoping, and nearly every clause carries distinct operational meaning. It is dense to the point of being run-on with fragmentary sentences, which costs a point on readability but not on waste.

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

Completeness5/5

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

For a multi-mode recall tool with six parameters, annotations, and an output schema, the description covers selection criteria, return shape, staleness handling, and cross-tool next steps. An agent has everything needed to call it correctly and interpret the result.

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 all six parameters are already documented in the schema. The description's parameter-adjacent advice ('retry with 2-4 phrasings', 'fewer, rarer words') largely restates what the schema's queries/query descriptions already say, so the baseline 3 applies.

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?

States a specific verb and resource: 'Read-only search of everything saved in earlier sessions', then enumerates the stored kinds. It is clearly distinguishable from siblings like crbro_inspect (read one entry whole) and crbro_map (system map), both of which it names.

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

Usage Guidelines5/5

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

Explicit when-to-use: 'Call it BEFORE answering anything about the user, their projects, preferences, decisions or past work'. It also names alternatives (crbro_inspect view=neuron, crbro_map) with the exact conditions that select them, plus retry guidance when nothing matches.

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